[no] bgp
config>service>vprn
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command enables the BGP protocol with the VPRN service.
The no form of this command disables the BGP protocol from the specific VPRN service.
no bgp
[no] advertise-inactive
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command enables or disables the advertising of inactive BGP routers to other BGP peers.
By default, BGP only advertises BGP routes to other BGP peers if a specific BGP route is chosen by the route table manager as the most preferred route within the system and is active in the forwarding plane. This command allows system administrators to advertise a BGP route even though it is not the most preferred route within the system for a specific destination.
no advertise-inactive
[no] aggregator-id-zero
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command sets the router ID in the BGP aggregator path attribute to zero when BGP aggregates routes. This prevents different routers within an AS from creating aggregate routes that contain different AS paths.
When BGP is aggregating routes, it adds the aggregator path attribute to the BGP update messages. By default, BGP adds the AS number and router ID to the aggregator path attribute.
When this command is enabled, BGP adds the router ID to the aggregator path attribute. This command is used at the group level to revert to the value defined under the global level, while this command is used at the neighbor level to revert to the value defined under the group level.
The no form of this command used at the global level reverts to default where BGP adds the AS number and router ID to the aggregator path attribute.
The no form of this command used at the group level reverts to the value defined at the group level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
no aggregator-id-zero
always-compare-med {zero | infinity}
no always-compare-med
config>service>vprn>bgp
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command specifies how the Multi-Exit Discriminator (MED) path attribute is used in the BGP route selection process. The MED attribute is always used in the route selection process regardless of the peer AS that advertised the route. This parameter determines what MED value is inserted in the RIB-IN. If this parameter is not configured, only the MEDs of routes that have the same peer ASs are compared.
The no form of this command removes the parameter from the configuration.
no always-compare-med
Specifies that for routes learned without a MED attribute that a zero (0) value is used in the MED comparison. The routes with the lowest metric are the most preferred.
Specifies for routes learned without a MED attribute that a value of infinity (4294967295) is used in the MED comparison. This in effect makes these routes the least desirable.
[no] as-path-ignore
config>service>vprn>bgp
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command determines whether the AS path is used to determine the best BGP route.
If this option is present, the AS paths of incoming routes are not used in the route selection process.
The no form of this command removes the parameter from the configuration.
no as-path-ignore
[no] as-override
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command replaces all instances of the peer's AS number with the local AS number in a BGP route's AS_PATH.
This command breaks the BGP's loop detection mechanism. It should be used carefully.
not enabled
authentication-key [authentication-key | hash-key] [hash | hash2]
no authentication-key
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the BGP authentication key.
Authentication is performed between neighboring routers before setting up the BGP session by verifying the password. Authentication is performed using the MD-5 message-based digest. The authentication key can be any combination of letters or numbers from 1 to 16.
The no form of this command removes the authentication password from the configuration and effectively disables authentication.
Authentication is disabled and the authentication password is empty.
Specifies the authentication key. The key can be any combination of ASCII characters up to 255 characters (unencrypted). If spaces are used in the string, enclose the entire string in quotation marks (‟ ”).
Specifies the hash key. The key can be any combination of ASCII characters up to 342 characters (encrypted). If spaces are used in the string, enclose the entire string in quotation marks (‟ ”).
This is useful when a user must configure the parameter, but, for security purposes, the actual unencrypted key value is not provided.
Specifies the key is entered in an encrypted form. If the hash parameter is not used, the key is assumed to be in a non-encrypted, clear text form. For security, all keys are stored in encrypted form in the configuration file with the hash parameter specified.
Specifies the key is entered in a more complex encrypted form. If the hash2 parameter is not used, the less encrypted hash form is assumed.
auth-keychain name
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the BGP authentication key for all peers.
The keychain allows the rollover of authentication keys during the lifetime of a session.
no auth-keychain
Specifies the name of an existing keychain, up to 32 characters, to use for the specified TCP session or sessions.
[no] backup-path [ipv4] [ipv6]
config>service>vprn>bgp
7210 SAS-T, 7210 SAS-Sx/S 1/10GE (standalone and standalone-VC), 7210 SAS-Sx 10/100GE, and 7210 SAS-Mxp.
This command enables the computation and use of a backup path for IPv4 and/or IPv6 BGP-learned prefixes belonging to the base router or a particular VPRN. Multiple paths must be received for a prefix to take advantage of this feature. When a prefix has a backup path and its primary paths fail the affected traffic is rapidly diverted to the backup path without waiting for control plane re-convergence to occur. When many prefixes share the same primary paths, and in some cases also the same backup path, the time to failover traffic to the backup path is independent of the number of prefixes.
By default, IPv4 and IPv6 prefixes do not have a backup path installed in the IOM.
no backup-path
Enables the use of a backup path for BGP-learned unlabeled IPv4 prefixes.
Enables the use of a backup path for BGP-learned unlabeled IPv6 prefixes.
connect-retry seconds
no connect-retry
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the BGP connect retry timer value in seconds.
When this timer expires, BGP tries to reconnect to the configured peer. This configuration parameter can be set at three levels: global level (applies to all peers), peer-group level (applies to all peers in group) or neighbor level (only applies to specified peer). The most specific value is used.
The no form of this command used at the global level reverts to the default value.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
120
The BGP Connect Retry timer value, in seconds, expressed as a decimal integer.
[no] damping
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command enables BGP route damping for learned routes which are defined within the route policy. Use damping to reduce the number of update messages sent between BGP peers and reduce the load on peers without affecting the route convergence time for stable routes. Damping parameters are set via route policy definition.
The no form of this command used at the global level disables route damping.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
When damping is enabled and the route policy does not specify a damping profile, the default damping profile is used. This profile is always present and consists of the following parameters:
Half-life: |
15 minutes |
Max-suppress: |
60 minutes |
Suppress-threshold: |
3000 |
Reuse-threshold |
750 |
no damping
[no] disable-4byte-asn
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command disables the use of 4-byte AS numbers. It can be configured at all 3 level of the hierarchy so it can be specified down to the per peer basis.
If this command is enabled 4-byte AS number support should not be negotiated with the associated remote peers.
The no form of this command resets the behavior to the default which is to enable the use of 4-byte AS number.
[no] disable-capability-negotiation
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command disables the exchange of capabilities. When this command is enabled and after the peering is flapped, any new capabilities are not negotiated and strictly support IPv4 routing exchanges with that peer.
The no form of this command removes this command from the configuration and restores the normal behavior.
no disable-capability-negotiation
[no] disable-capability-negotiation
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command disables the exchange of capabilities. When command is enabled and after the peering is flapped, any new capabilities are not negotiated and strictly support IPv4 routing exchanges with that peer.
The no form of this command removes this command from the configuration and restores the normal behavior.
no disable-capability-negotiation
disable-communities [standard] [extended]
no disable-communities
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures BGP to disable sending communities.
Specifies standard communities that existed before VPRNs or 2547.
Specifies BGP communities used were expanded after the concept of 2547 was introduced, to include handling the VRF target.
[no] disable-fast-external-failover
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures BGP fast external failover.
[no] enable-peer-tracking
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command enables BGP peer tracking.
no enable-peer-tracking
export policy [policy...]
no export
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command specifies the export policies to be used to control routes advertised to BGP neighbors.
When multiple policy names are specified, the policies are evaluated in the order they are specified. A maximum of five (5) policy names can be configured. The first policy that matches is applied.
Note that if a non-existent route policy is applied to a VPRN instance, the CLI generates a warning message. This message is only generated at an interactive CLI session and the route policy association is made. No warning message is generated when a non-existent route policy is applied to a VPRN instance in a configuration file or when SNMP is used.
The no form of this command removes all route policy names from the export list.
no export
Specifies a route policy statement name.
family [ipv4] [ipv6]
no family
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the IP family capability.
The no form of this command reverts to the default.
no family
Specifies IPv4 support.
Specifies IPv6 support.
group name [dynamic-peer]
no group
config>service>vprn>bgp
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures a BGP peer group.
The no form of this command deletes the specified peer group and all configurations associated with the peer group. The group must be shutdown before it can be deleted.
Specifies the peer group name. Allowed values is a string up to 32 characters composed of printable, 7-bit ASCII characters. If the string contains special characters (#, $, spaces, etc.), the entire string must be enclosed within double quotes.
Specifies that the specific BGP group is used by BGP peers created dynamically based on subscriber-hosts pointing to corresponding BGP peering policy. There can be only one BGP group with this flag set in any specific VPRN. No BGP neighbors can be manually configured in a BGP group with this flag set.
[no] neighbor ip-address
config>service>vprn>bgp>group
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command creates a BGP peer/neighbor instance within the context of the BGP group.
This command can be issued repeatedly to create multiple peers and their associated configuration.
The no form of this command removes the specified neighbor and the entire configuration associated with the neighbor. The neighbor must be administratively shutdown before attempting to delete it. If the neighbor is not shutdown, the command does not result in any action except a warning message on the console indicating that neighbor is still administratively up.
Specifies the IP address of the BGP peer router in dotted decimal notation.
family [ipv4] [ipv6]
no family
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command specifies the address family or families to be supported over BGP peerings in the base router. This command is additive so issuing the family command adds the specified address family to the list.
The no form of this command removes the specified address family from the associated BGP peerings. If an address family is not specified, reset the supported address family back to the default.
ipv4
Specifies support for IPv4 routing information.
Specifies support for IPv6 routing information.
hold-time seconds [strict]
no hold-time
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the BGP hold time, expressed in seconds.
The BGP hold time specifies the maximum time BGP waits between successive messages (either keepalive or update) from its peer, before closing the connection. This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in group) or neighbor level (only applies to specified peer). The most specific value is used.
Even though the router OS implementation allows setting the keepalive time separately, the configured keepalive timer is overridden by the hold-time value under the following circumstances:
If the specified hold-time is less than the configured keepalive time, the operational keepalive time is set to a third of the hold-time; the configured keepalive time is not changed.
If the hold-time is set to zero, the operational value of the keepalive time is set to zero; the configured keepalive time is not changed. This means that the connection with the peer is up permanently and no keepalive packets are sent to the peer.
The no form of this command used at the global level reverts to the default value.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
90
The hold-time, in seconds, expressed as a decimal integer. A value of 0 indicates the connection to the peer is up permanently.
Specifies the advertised BGP hold-time from the far-end BGP peer must be greater than or equal to the specified value.
import policy [policy...]
no import
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command specifies the import policies to be used to control routes advertised to BGP neighbors. Route policies are configured in the config>router>policy-options context. When multiple policy names are specified, the policies are evaluated in the order they are specified. A maximum of five (5) policy names can be specified. The first policy that matches is applied.
The no form of this command removes all route policy names from the import list.
no import
Specifies aroute policy statement name.
keepalive seconds
no keepalive
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the BGP keepalive timer. A keepalive message is sent every time this timer expires. The seconds parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
The keepalive value is generally one-third of the hold-time interval. Even though the OS implementation allows the keepalive value and the hold-time interval to be independently set, under the following circumstances, the configured keepalive value is overridden by the hold-time value:
If the specified keepalive value is greater than the configured hold-time, the specified value is ignored, and the keepalive is set to one third of the current hold-time value.
If the specified hold-time interval is less than the configured keepalive value, the keepalive value is reset to one third of the specified hold-time interval.
If the hold-time interval is set to zero, the configured value of the keepalive value is ignored. This means that the connection with the peer is up permanently and no keepalive packets are sent to the peer.
The no form of this command used at the global level reverts to the default value.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
30
The keepalive timer, in seconds, expressed as a decimal integer.
local-address ip-address
no local-address
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
Configures the local IP address used by the group or neighbor when communicating with BGP peers.
Outgoing connections use the local-address as the source of the TCP connection when initiating connections with a peer.
When a local address is not specified, the 7210 SAS uses the system IP address when communicating with iBGP peers and uses the interface address for directly connected eBGP peers. This command is used at the neighbor level to revert to the value defined under the group level.
The no form of this command removes the configured local-address for BGP.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
Specifies the router ID is used when communicating with iBGP peers and the interface address is used for directly connected eBGP peers.
Specifies the local address expressed in dotted decimal notation. Allowed values are a valid routable IP address on the router, either an interface or system IP address.
local-as as-number [private]
no local-as
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures a BGP virtual autonomous system (AS) number.
In addition to the AS number configured for BGP in the config>router>autonomous-system context, a virtual (local) AS number is configured.The virtual AS number is added to the as-path message before the router AS number makes the virtual AS the second AS in the as-path.
This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). Therefore, by specifying this at each neighbor level, it is possible to have a separate as-number per eBGP session.
When a command is entered multiple times for the same AS, the last command entered is used in the configuration. The private attribute can be added or removed dynamically by reissuing the command.
Changing the local AS at the global level in an active BGP instance causes the BGP instance to restart with the new local AS number. Changing the local AS at the global level in an active BGP instance causes BGP to reestablish the peer relationships with all peers in the group with the new local AS number. Changing the local AS at the neighbor level in an active BGP instance causes BGP to reestablish the peer relationship with the new local AS number.
This is an optional command and can be used in the following circumstance:
Provider router P is moved from AS1 to AS2. The customer router that is connected to P, however, is configured to belong to AS1. To avoid reconfiguring the customer router, the local-as value on router P can be set to AS1. Therefore, router P adds AS1 to the as-path message for routes it advertises to the customer router.
The no form of this command used at the global level removes any virtual AS number configured.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
no local-as
Specifies the virtual autonomous system number, expressed as a decimal integer.
Specifies the local-as is hidden in paths learned from the peering.
local-preference local-preference
no local-preference
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command sets the BGP local-preference attribute in incoming routes if not specified and configures the default value for the attribute. This value is used if the BGP route arrives from a BGP peer without the local-preference integer set.
The specified value can be overridden by any value set via a route policy. This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
The no form of this command at the global level specifies that incoming routes with local-preference set are not overridden and routes arriving without local-preference set are interpreted as if the route had local-preference value of 100.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
The default of no-local-preference does not override the local-preference value set in arriving routes and analyze routes without local preference with value of 100.
no local-preference
Specifies the local preference value to be used as the override value, expressed as a decimal integer.
loop-detect {drop-peer | discard-route | ignore-loop | off}
no loop-detect
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures how the BGP peer session handles loop detection in the AS path.
This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
Note that dynamic configuration changes of loop-detect are not recognized.
The no form of this command used at the global level reverts to default, which is loop-detect ignore-loop.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
loop-detect ignore-loop
Sends a notification to the remote peer and drops the session.
Discards routes received with loops in the AS path.
Ignores routes with loops in the AS path but maintains peering.
Disables loop detection.
med-out {number | igp-cost}
no med-out
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command enables advertising the Multi-Exit Discriminator (MED) and assigns the value used for the path attribute for the MED advertised to BGP peers if the MED is not already set.
The specified value can be overridden by any value set via a route policy.
This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
The no form of this command used at the global level reverts to default where the MED is not advertised.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
no med-out
Specifies the MED path attribute value, expressed as a decimal integer.
Specifies the MED is set to the IGP cost of the specific IP prefix.
min-as-origination seconds
no min-as-origination
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the minimum interval, in seconds, at which a path attribute, originated by the local router, can be advertised to a peer.
This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
The no form of this command used at the global level reverts to default.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
15
Specifies the minimum path attribute advertising interval, in seconds, expressed as a decimal integer.
min-route-advertisement seconds
no min-route-advertisement
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the minimum interval, in seconds, at which a prefix can be advertised to a peer.
This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
The no form of this command reverts to default values.
30
The minimum route advertising interval, in seconds, expressed as a decimal integer.
multihop ttl-value
no multihop
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the Time To Live (TTL) value entered in the IP header of packets sent to an eBGP peer multiple hops away.
This parameter is meaningful only when configuring eBGP peers. It is ignored if set for an iBGP peer.
The no form of this command is used to convey to the BGP instance that the eBGP peers are directly connected.
The no form of this command reverts to default values.
1 — eBGP peers are directly connected.
64 — iBGP
Specifies the TTL value, expressed as a decimal integer.
[no] next-hop-self
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the group or neighbor to always set the NEXTHOP path attribute to its own physical interface when advertising to a peer.
This is primarily used to avoid third-party route advertisements when connected to a multi-access network.
The no form of this command used at the group level allows third-party route advertisements in a multi-access network.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
The default means that third-party route advertisements are allowed.
no next-hop-self
peer-as as-number
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the autonomous system number for the remote peer. The peer AS number must be configured for each configured peer.
For eBGP peers, the peer AS number configured must be different from the autonomous system number configured for this router under the global level, because the peer is in a different autonomous system than this router.
For iBGP peers, the peer AS number must be the same as the autonomous system number of this router configured under the global level.
This is a required command for each configured peer. This may be configured under the group level for all neighbors in a particular group.
No AS numbers are defined.
The autonomous system number, expressed as a decimal integer.
[no] preference preference
config>service>vprn>bgp
config>service>vprn>bgp>group
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the route preference for routes learned from the configured peers.
This configuration parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
The lower the preference the higher the chance of the route being the active route. The OS assigns BGP routes highest default preference compared to routes that are direct, static or learned via MPLS or OSPF.
The no form of this command used at the global level reverts to default value.
The no form of this command used at the group level reverts to the value defined at the global level.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
170
Specifies the route preference, expressed as a decimal integer.
[no] path-mtu-discovery
config>router>bgp
config>router>bgp>group
config>router>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command enables path MTU discovery for the associated TCP connections. In doing so, the MTU for the associated TCP session is initially set to the egress interface MTU. The DF bit is also set so that if a router along the path of the TCP connection cannot handle a packet of a particular size without fragmenting, it sends back an ICMP message to set the path MTU for the specific session to a lower value that can be forwarded without fragmenting.
The no form of this command disables path MTU discovery.
no path-mtu-discovery
prefix-limit limit [log-only] [threshold percent]
no prefix-limit
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures the maximum number of routes BGP can learn from a peer.
When the number of routes reaches a certain percentage (default is 90% of this limit), an SNMP trap is sent. When the limit is exceeded, the BGP peering is dropped and disabled.
The no form of this command removes the prefix-limit.
no prefix-limit
Specifies the number of routes that can be learned from a peer, expressed as a decimal integer.
Enables the warning message to be sent at the specified threshold percentage, and also when the limit is exceeded. However, the BGP peering is not dropped.
Specifies the threshold value (as a percentage) that triggers a warning message to be sent. The default value is 90%.
[no] rapid-withdrawal
config>service>vprn>bgp
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command disables the delay (Minimum Route Advertisement) on sending BGP withdrawals. Normal route withdrawals may be delayed up to the minimum route advertisement to allow for efficient packing of BGP updates.
The no form of this command removes this command from the configuration and returns withdrawal processing to the normal behavior.
no rapid-withdrawal
[no] remove-private
config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command allows private AS numbers to be removed from the AS path before advertising them to BGP peers.
When the remove-private parameter is set at the global level, it applies to all peers regardless of group or neighbor configuration. When the parameter is set at the group level, it applies to all peers in the group regardless of the neighbor configuration.
The software recognizes the set of AS numbers that are defined by IANA as private. These are AS numbers in the range 64512 through 65535, inclusive.
The no form of this command used at the global level reverts to default value.
The no form of this command used at the group level reverts to the value defined at the global level. The no form of this command used at the neighbor level reverts to the value defined at the group level.
no remove-private — Private AS numbers are included in the AS path attribute.
[no] type {internal | external}
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command designates the BGP peer as type internal or external.
The type of internal indicates the peer is an iBGP peer while the type of external indicates that the peer is an eBGP peer.
By default, the software derives the type of neighbor based on the local AS specified. If the local AS specified is the same as the AS of the router, the peer is considered internal. If the local AS is different, the peer is considered external.
The no form of this command used at the group level reverts to the default value.
The no form of this command used at the neighbor level reverts to the value defined at the group level.
no type — Type of neighbor is derived on the local AS specified.
Configures the peer as internal.
Configures the peer as external.
ttl-security min-ttl-value
no ttl-security
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Supported on all 7210 SAS platforms as described in this document, except those operating in access-uplink mode
This command configures TTL security parameters for incoming packets.
Specifies the minimum TTL value for an incoming BGP packet.