Cisco Systems 8510 CSR, 8540 CSR appendix Overhead c2 byte j0 bytes, Msg line j1 16byte exp-msg

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Chapter 4 Configuring Interfaces

Configuring the ATM Uplink Interface (Catalyst 8540)

To configure the SONET overhead, perform the following steps, beginning in global configuration mode:

 

 

 

Command

Purpose

Step 1

 

 

Router(config)# interface atm

Enters interface configuration mode and specifies the ATM

 

 

 

slot/subslot/interface

interface to configure.

 

 

 

Router(config-if)#

 

 

Step 2

 

 

Router(config-if)# sonet

Configures the SONET overhead bytes. c2 is a path signal label

 

 

 

overhead [c2 byte] [j0 {bytes

identifier, j0 is the section trace bytes, j1 is the path trace bytes,

 

 

 

msg line}] [j1 {16byte {exp-msg

and sls0 is part of the payload pointer byte.

 

 

 

linemsg line} 64byte {exp-msg

 

 

 

 

 

line msg line}] [sls0 bits]

 

 

Step 3

 

 

Router(config-if)# no shutdown

Enables the interface with the previous configuration.

 

 

 

 

 

 

 

 

 

 

 

 

Note

On the ATM OC-3c interface, you can configure the c2 byte and the s1s0 bits. On the ATM

 

 

 

OC-12c interface, you can configure the c2 byte, j0 byte, j1 byte, and the s1s0 bits.

 

 

 

 

 

 

The value of the c2 byte is determined as follows:

If the value of the c2 byte has not been explicitly configured with the sonet overhead command, the SONET framer sends the ATM payload value of 0x13.

If the value of the c2 byte has been explicitly configured with the sonet overhead command, the configured value is sent regardless of the encapsulation method.

The value of the s1s0 byte is determined as follows:

If the value s1s0 bytes has not been explicitly configured with the sonet overhead command, the SONET framer sends the following values:

For SONET framing, the default value is 0.

For SDH framing, the default value is 2.

If the value of the s1s0 bits have been explicitly configured with the sonet overhead command, the configured value is used regardless of the framing.

The value of the j0 and the j1 bytes are determined as follows:

If the value of the j0 and the j1 bytes have not been explicitly configured with the sonet overhead command, the SONET framer sets default values of 0x0 for both.

If the user has specified a value using the sonet overhead command, the configured value is used regardless of the framing.

 

Layer 3 Switching Software Feature and Configuration Guide

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78-6235-04, Cisco IOS Release 12.0(10)W5(18)

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Contents Configuring Interfaces Interface Port Identifier Overview of Interface ConfigurationMedia Access Control Address Routerconfig# interface gigabitethernet 1/0/1 General Instructions for Configuring InterfacesRouter# configure terminal About Layer 3 Switching Interfaces Initially Configuring Gigabit Ethernet Interfaces Command PurposeAbout the Enhanced Gigabit Ethernet Interfaces Catalyst ExampleCommand Description Initially Configuring Fast Ethernet InterfacesVerifying the Ethernet Interface Configuration Router# show interface fastethernet 1/0/0 ExamplesRouter# show interface gigabitethernet 0/0/0 Configuring ISL Vlan Encapsulation About Virtual LANsEnters subinterface configuration mode Routerconfig-subif#Configure the Fast Ethernet main interface Routerconfig-if# Routerconfig# bridge bridge-group protocol ieeeConfiguring 802.1Q Vlan Encapsulation Routerconfig# interface fastethernet 1/0/1.1Routerconfig-subif#interface fastethernet 1/0/0 Routerconfig-subif#interface fastethernet 3/0/1Bridge-group IeeeMonitoring Vlan Operation About Packet over Sonet CatalystAbout the POS OC-12c Uplink Interface POSConfiguring the POS OC-12c Uplink Interface Catalyst Parameter Configuration Command Default Value Default ConfigurationInitially Configuring the POS Interface Automatic Reverting of Clock Source Ip-address subnet-maskHdlc ppp Line internalSetting the MTU Size Customizing the ConfigurationAdditional Configurations Configuring Framing Configuring Sonet OverheadSdh sonet Value j0 value sls0 valueScramble-atm Configuring POS SPE ScramblingScrambling is on by default Configuring Sonet Alarms Alarm Description Configuring Sonet Delay TriggersAlarm Verifying the POS Configuration Lais pais plop prdi slofSlos Triggers line path millisecondRouter# show protocols pos 1/0/0 Router# show controllers pos 2/0/0 LOP = PLM-PRouter# show controller pos 2/0/0 detail Smdr About ATM Uplinks Catalyst About the ATM Uplink InterfaceConfiguring the ATM Uplink Interface Catalyst Configuration OverviewNo loopback No atm sonet stm-1 for OC-3Initially Configuring the ATM Uplink Interface No atm clock internalAtm vc-per-vp Parameter ValueConfiguring the Clock Source Configuring Sonet Framing Routerconfig-if# atm sonetStm-1 ATM interface or to STM-4 for the OC-12c interfaceOverhead c2 byte j0 bytes Msg line j1 16byte exp-msgSls0 is part of the payload pointer byte Line msg line 64byte exp-msgConfiguring Loopback Configuring Virtual Circuits Configuring CDPConfiguring the Maximum VCs per VP Creating a PVCMapping a Protocol Address to a PVC Vpi vci aal-encapIp-address atm-vc vcd NameSwitch Router B Verifying the ATM ConfigurationSwitch Router a 5CB Configuring Interfaces About Port Snooping About Port SnoopingConfiguring Snooping Restrictions on Port SnoopingAbout the Snooping Destination Port About the Snooping Source PortDirection receive transmit both Source-portMonitoring Snooping Show snoop interfaceDestination-port Show snoop78-6235-04, Cisco IOS Release 12.010W518