[no] path [sonet-sdh-index]
config>port>sonet-sdh
This command defines the SONET/SDH path.
The no form of this command removes the specified SONET/SDH path.
no index is specified
specifies the components making up the SONET/SDH path. Depending on the SONET/SDH adapter card and the type of SONET/SDH port, the sonet-sdh-index must specify one or more path indexes to identify the payload location of the path. The CLI uses the same sonet-sdh-index syntax nomenclature to configure SONET and SDH paths.
In addition, the support of virtual tributary circuits adds another level of complexity and several levels of indexes, which means that one or more path commands may be needed to set up the container in the path.
On the 4-port OC3/STM1 Clear Channel Adapter card, sonet-sdh-index is optional; if used, the value must be sts3.
crc {16 | 32}
config>port>sonet-sdh>path
This command specifies a cyclic redundancy check on a SONET/SDH path on a SONET/SDH port.
32 (if the encap-type is set to atm; this default cannot be changed)
16 (if the encap-type is set to ppp-auto; port is configured for POS)
specifies that a 16-bit checksum be used for the associated port/channel
specifies that a 32-bit checksum be used for the associated port/channel
encap-type {atm | ppp-auto}
config>port>sonet-sdh>path
This command configures the encapsulation method used to distinguish customer traffic on a SONET/SDH path on a SONET/SDH port.
The encap-type of atm is used for access mode (4-port OC3/STM1 Clear Channel Adapter card and 2-port OC3/STM1 Channelized Adapter card), and the encap-type of ppp-auto is used for network mode (4-port OC3/STM1 / 1-port OC12/STM4 Adapter card).
When encap-type is atm, the crc default of 32 cannot be changed.
When encap-type is atm, ATM sublayer verification specified in GR-1248-CORE, Generic Requirements for Operations of ATM Network Elements, is automatically enabled. The result of the verification includes:
Out of Cell Delineation (OCD) event count — the OCD event count is described in RFC 2515, Definitions of Managed Objects for ATM Management. Multiple events occurring within 1 s will be counted as one event for ATM and ASAP adapter cards as a result of a hardware limit.
Loss of Cell Delineation (LCD) defect/alarm — the LCD defect/alarm is defined in RFC 2515, Definitions of Managed Objects for ATM Management. When a path is in an LCD defect state, the path’s operational status is down. When a path exits the LCD state, the path’s operational status will change to up (assuming nothing else causes the path to stay down). A trap is raised to indicate the LCD status change, and a Path Remote Defect Indicator (PRDI) is sent to indicate the defect to the remote end.
To change the encap-type, the path must first be removed and then recreated with the new encap-type. For example, to change the encap-type from atm to ppp-auto:
config>port>sonet-sdh>path# back
config>port>sonet-sdh# no path
config>port>sonet-sdh# path
config>port>sonet-sdh>path# mode network
config>port>sonet-sdh>path# encap-type ppp-auto
config>port>sonet-sdh>path#
no encap-type
specifies that the encapsulation on the port is ATM
enables PPP on the associated port or channel. The activation of IPCP and MPLSCP is automatic depending on the protocol configuration.
mode {access | network}
config>port>sonet-sdh>path
This command configures the mode of operation for a SONET/SDH port or channel on a 4-port OC3/STM1 Clear Channel Adapter card or 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card.
An access port or channel is used for customer-facing traffic on which services are configured. A Service Access Point (SAP) can only be configured on an access port or channel. When a port or channel on the 4-port OC3/STM1 Clear Channel Adapter card is configured for access mode, the encap-type must be set to atm. The 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card does not support ATM when configured for access mode.
A network port or channel configured for Packet over SONET (POS) is used as an uplink to connect to the packet network and transport the configured services. When a port or channel is configured for network mode, the encap-type must be set to ppp-auto.
To change the mode, the path must first be removed and then recreated with the new mode. For example, to change the mode from access to network:
config>port>sonet-sdh>path# back
config>port>sonet-sdh# no path
config>port>sonet-sdh# path
config>port>sonet-sdh>path# mode network
config>port>sonet-sdh>path#
access
configures the port or channel for access mode
configures the port or channel for network mode
mtu mtu
no mtu
config>port>sonet-sdh>path
This command configures the maximum payload MTU size for a SONET/SDH port on a 4-port OC3/STM1 Clear Channel Adapter card. When encap-type is atm, the path MTU value cannot be changed. Refer to the 7705 SAR Services Guide, ‟Global Service Command Reference”, for information on configuring the path MTU.
The no form of this command restores the default value.
1524 (for access mode)
1572 (for network mode)
sets the maximum allowable size of the MTU, expressed as an integer
payload {sts12 | sts3 | tug3 | ds3 | e3 | vt2 | vt15 | ds1 | e1}
config>port>sonet-sdh>path
This command configures the SONET/SDH path on a channelized adapter card (2-port OC3/STM1 Channelized Adapter card or 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card) as an asynchronous circuit or a virtual tributary group.
n/a
configures the STS12/STM4 (OC12/OC3) payload as clear channel
configures the STS3/STM1 payload as clear channel
configures the STS3/STM1 payload as tributary unit group 3 (TUG3)
configures the port or channel as D3 STS1/VC3
configures the VC3 payload as E3
configures the STS1 payload as virtual tributary group 2
configures the path as virtual tributary group 1.5
configures the port or channel VT1.5 or VT2 payload as DS1
configures the VT2 payload as E1
ppp
config>port>sonet-sdh>path
This command enables access to the context to configure the Link Control Protocol (LCP) operational parameters for a Packet over Sonet (POS) Point-to-Point Protocol (PPP) link on a 4-port OC3/STM1 Clear Channel Adapter card.
n/a
keepalive time-interval [dropcount drop-count]
no keepalive
config>port>sonet-sdh>path>ppp
This command enables the sending of keepalive echo messages on a 4-port OC3/STM1 Clear Channel Adapter card and configures the time between messages and how many reports can be missed before the link is brought down.
The no form of this command disables the sending of echo requests.
keepalive 10 dropcount 3
the time interval, in seconds, that echo requests are issued
the number of keepalive messages that can be missed before the link is brought down
[no] report-alarm [pais] [plop] [prdi] [pplm] [prei] [puneq] [plcd]
config>port>sonet-sdh>path
This command enables logging of SONET/SDH path alarms for a SONET/SDH port.
The no form of this command disables logging of the specified alarms.
reports path alarm indication signal errors. When configured, path alarm indication signal alarms are raised and cleared.
reports path loss of pointer errors, per tributary. When configured, path loss of pointer alarms are raised but not cleared.
reports path remote defect indication errors. When configured, path remote defect indication alarms are raised and cleared.
reports a path payload mismatch, which places the channel operationally down. When configured, path payload mismatch alarms are raised but not cleared.
reports a path error condition raised by the remote end as a result of b3 errors received from this node. When configured, path error alarms are raised but not cleared. (This parameter is not supported on the 4-port OC3/STM1 card.)
reports path unequipped errors
reports path loss of code group delineation errors. It is applicable only when the value of xgig is set to WAN. Although this option is shown on the CLI, it is not available for use on the 7705 SAR.
[no] scramble
config>port>sonet-sdh>path
This command enables SONET/SDH payload scrambling on a 4-port OC3/STM1 Clear Channel Adapter card.
Scrambling randomizes the pattern of 1s and 0s carried in a SONET frame. Scrambling, or rearranging, the pattern prevents continuous strings of all 1s or all 0s and meets the needs of physical layer protocols that rely on sufficient transitions between 1s and 0s to maintain clocking.
For ATM, this command enables or disables ATM cell-level payload scrambling or descrambling using the x43+1 polynomial as defined in ITU-T I.432.1. Scrambling is enabled by default for the ATM path or channel. This scrambling is done in addition to SONET/SDH frame scrambling or descrambling, which is always enabled in the framer.
The no form of this command disables scrambling.
scramble
signal-label value
no signal-label
config>port>sonet-sdh>path
This command sets the C2 byte value. The purpose of this byte is to communicate the payload type being encapsulated by SONET framing.
0xcf
specifies the C2 byte value, expressed as a decimal integer or a hexadecimal value
trace-string [trace-string]
no trace-string
config>port>sonet-sdh>path
This command specifies the path trace identifier for the circuit that is continuously inserted at source. This identifier corresponds to J1 or J2 in the SONET/SDH overhead, depending on the associated path. The specified trace string can be checked against the expected value by the receiver. If no trace string is entered, a null string is used.
The no form of this command resets the string to its default.
The default path trace value is ALU 7705 SAR. The value does not change when the encap-type changes. The path trace string contains all zeros for a non-provisioned path.
specifies an alphanumeric string value. If the string contains spaces, enclose it in quotation marks.