dhcp
config>service>vpls>sap
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
Commands in this context configure DHCP snooping parameters.
action {replace | drop | keep}
no action
config>service>vpls>sap>dhcp>option
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command configures the Relay Agent Information Option (Option 82) processing.
The no form of this command reverts to the default value.
no action
Specifies that in the upstream direction (from the user), the Option 82 field from the router is inserted in the packet (overwriting any existing Option 82 field). In the downstream direction (toward the user) the Option 82 field is stripped (in accordance with RFC 3046).
Specifies that a DHCP packet is dropped if an Option 82 field is present, and a counter is incremented.
Specifies that the existing information is kept in the packet and the router does not add any additional information. In the downstream direction the Option 82 field is not stripped and is forwarded toward the client.
The behavior is slightly different in case of Vendor Specific Options (VSOs). When the keep parameter is specified, the router inserts its own VSO into the Option 82 field. This is only done when the incoming message has already an Option 82 field.
If no Option 82 field is present, the router does not create the Option 82 field. In this in that case, no VSO is added to the message.
circuit-id [ascii-tuple | vlan-ascii-tuple]
no circuit-id
config>service>vpls>sap>dhcp>option
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
When enabled, the router sends an ASCII-encoded tuple in the circuit-id sub-option of the DHCP packet. This ASCII-tuple consists of the access-node-identifier, service-id, and SAPID, separated by ‟|”. If no keyword is configured, then the circuit-id sub-option is not part of the information option (Option 82).
When the command is configured without any parameters, it equals to circuit-id ascii-tuple.
If disabled, the circuit-id sub-option of the DHCP packet is left empty.
By default, circuit-id is enabled if any of the other options, such as remote-id or vso, are configured.
no circuit-id
Specifies that the ASCII-encoded concatenated tuple is used which consists of the access-node-identifier, service-id, and interface-name is used.
Specifies the circuit-id hex string.
Specifies that the format includes VLAN ID and dot1p bits as well as what is included in ascii-tuple already. The format is supported on dot1q and qinq encapsulated ports only. Therefore, when the Option 82 bits are stripped, dot1p bits are copied to the Ethernet header of an outgoing packet.
[no] option
config>service>vpls>sap>dhcp
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command enables DHCP Option 82 (Relay Agent Information Option) parameters processing and enters the context for configuring Option 82 sub-options.
The no form of this command reverts to the default value.
no option
remote-id [mac | string string]
no remote-id
config>service>vpls>sap>dhcp>option
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
When enabled, the router sends the MAC address of the remote end (typically the DHCP client) in the remote-id sub-option of the DHCP packet. This command identifies the host at the other end of the circuit.
If disabled, the remote-id sub-option of the DHCP packet is left empty.
The no form of this command reverts the system to the default.
remote-id
Specifies the MAC address of the remote end is encoded in the sub-option.
Specifies the remote-id.
[no] vendor-specific-option
config>service>vpls>sap>dhcp>option
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command configures the vendor specific sub-option of the DHCP relay packet.
[no] client-mac-address
config>service>vpls>sap>dhcp>option>vendor
config>service>ies>if>dhcp>option>vendor
config>service>vprn>if>dhcp>option>vendor
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command enables sending the MAC address in the vendor specific sub-option of the DHCP relay packet.
The no form of this command disables the sending of the MAC address in the vendor specific sub-option of the DHCP relay packet.
[no] sap-id
config>service>vpls>sap>dhcp>option>vendor
config>service>ies>if>dhcp>option>vendor
config>service>vprn>if>dhcp>option>vendor
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command enables sending the SAP ID in the vendor specific suboption of the DHCP relay packet.
The no form of this command disables the sending of the SAP ID in the vendor specific suboption of the DHCP relay packet.
[no] service-id
config>service>vpls>sap>dhcp>option>vendor
config>service>ies>if>dhcp>option>vendor
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command enables sending the service ID in the vendor specific suboption of the DHCP relay packet.
The no form of this command disables the sending of the service ID in the vendor specific suboption of the DHCP relay packet.
[no] string text
config>service>vpls>sap>dhcp>option>vendor
config>service>ies>if>dhcp>option>vendor
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command specifies the string in the vendor specific suboption of the DHCP relay packet.
The no form of this command reverts to the default value.
The string can be any combination of ASCII characters up to 32 characters. If spaces are used in the string, enclose the entire string in quotation marks (‟ ”).
[no] system-id
config>service>vpls>sap>dhcp>option>vendor
config>service>ies>if>dhcp>option>vendor
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command specifies whether the system-id is encoded in the vendor specific sub-option of Option 82.
relay-plain-bootp
no relay-plain-bootp
config>service>vpls>if>dhcp
config>service>ies>if>dhcp
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command enables the relaying of plain BOOTP packets.
The no form of this command disables the relaying of plain BOOTP packets.
server server1 [server2...(up to 8 max)]
config>service>ies>if>dhcp
config>service>vprn>if>dhcp (not supported in access-uplink operating mode)
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command specifies a list of servers where requests are forwarded. The list of servers can be entered as either IP addresses or fully qualified domain names. There must be at least one server specified for DHCP relay to work. If there are multiple servers then the request is forwarded to all of the servers in the list.
There can be a maximum of eight DHCP servers configured.
no server
Specifies the DHCP server IP address.
[no] trusted
config>service>ies>if>dhcp
config>service>vprn>if>dhcp (not supported in access-uplink operating mode)
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command enables relaying of untrusted packets.
The no form of this command disables the relay.
not enabled
[no] snoop
config>service>vpls>sap>dhcp
Supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode
This command enables DHCP snooping of DHCP messages on the SAP. Enabling DHCP snooping on VPLS interfaces (SAPs) is required where DHCP messages where Option 82 information is to be inserted. This includes interfaces that are in the path to receive messages from either DHCP servers or from subscribers.
The no form of this command disables DHCP snooping on the specified VPLS SAP.
no snoop