Configuring Loopback | Cisco Systems 8540 CSR, 8510 CSR specs

Chapter 4 Configuring Interfaces

Configuring the ATM Uplink Interface (Catalyst 8540)

Configuring SONET Alarms

The ATM OC-12c and the ATM OC-3c uplink interfaces support SONET alarm monitoring. To configure alarm monitoring, perform the following steps, beginning in global configuration mode:

	Command	Purpose
Step 1
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
Step 2	Router(config-if)# sonet report	Permits console logging of selected SONET alarms.
	{b1-tca b2-tca b3-tca lais	The alarms are as follows:
	lrdi pais plm-p plop prdi	The alarms are as follows:
	lrdi pais plm-p plop prdi	• b1-tca(B1 bit error rate [BER] threshold crossing alarm)
	rdool sd-ber sf-ber slof slos	• b1-tca(B1 bit error rate [BER] threshold crossing alarm)
	tim-p uneq-p}	• b2-tca(B2 BER threshold crossing alarm)
		• b2-tca(B2 BER threshold crossing alarm)
		• b3-tca(B3 BER threshold crossing alarm)
		• lais (line alarm indication signal)
		• lrdi (line remote defect indication)
		• pais (path alarm indication signal)
		• plm-p(payload label, C2 mismatch alarm)
		• plop (path loss of pointer), prdi (path remote defect
		indication)
		• rdool (receive data out of lock)
		• sd-ber(LBIP BER in excess of threshold)
		• sf-ber(signal failure BER)
		• slof (section loss of frame)
		• slos (section loss of signal)
		• tim-p(path trace identifier, J1 mismatch alarm)
		• uneq-p(path unequipped C2 alarm).
		The b1-tca,b2-tca,b3-tca,plop, sf-ber,slof, slos are enabled by
		default.
Step 3
Step 3	Router(config-if)# sonet	Sets the BER threshold values of the specified alarms. Default
	threshold {b1-tca b2-tca	values are 6 for b1-tca, b2-tca, b3-tca, and sd-ber; 3 for sf-ber.
	b3-tca sd-ber sf-ber}rate

To determine which alarms are reported on the ATM interface, and to display the BER thresholds, use the show controllers atm command, as described in the “Verifying the ATM Configuration” section on page 4-36.For a detailed description of the sonet report and sonet threshold commands, refer to the ATM Switch Router Command Reference publication.

Configuring Loopback

The ATM uplink interface is configured by default with no loopback. To enable loopback, use the loopback command in interface configuration mode.

		Layer 3 Switching Software Feature and Configuration Guide
		Layer 3 Switching Software Feature and Configuration Guide
	78-6235-04, Cisco IOS Release 12.0(10)W5(18)			4-33
	78-6235-04, Cisco IOS Release 12.0(10)W5(18)			4-33

Image 33

Cisco Systems 8540 CSR, 8510 CSR appendix Configuring Loopback

Contents

Configuring Interfaces Overview of Interface Configuration Media Access Control AddressInterface Port Identifier General Instructions for Configuring Interfaces Router# configure terminalRouterconfig# interface gigabitethernet 1/0/1 About Layer 3 Switching Interfaces Command Purpose Initially Configuring Gigabit Ethernet InterfacesAbout the Enhanced Gigabit Ethernet Interfaces Catalyst Example Initially Configuring Fast Ethernet Interfaces Verifying the Ethernet Interface ConfigurationCommand Description Examples Router# show interface gigabitethernet 0/0/0Router# show interface fastethernet 1/0/0 About Virtual LANs Configuring ISL Vlan Encapsulation Routerconfig-subif# Enters subinterface configuration modeConfigure the Fast Ethernet main interface Routerconfig-if# Routerconfig# bridge bridge-group protocol ieee Routerconfig# interface fastethernet 1/0/1.1 Configuring 802.1Q Vlan EncapsulationRouterconfig-subif#interface fastethernet 1/0/0 Routerconfig-subif#interface fastethernet 3/0/1 Ieee Bridge-group About Packet over Sonet Catalyst Monitoring Vlan Operation POS About the POS OC-12c Uplink Interface Configuring the POS OC-12c Uplink Interface Catalyst Default Configuration Initially Configuring the POS InterfaceParameter Configuration Command Default Value Ip-address subnet-mask Automatic Reverting of Clock SourceHdlc ppp Line internal Customizing the Configuration Additional ConfigurationsSetting the MTU Size Configuring Sonet Overhead Configuring FramingSdh sonet Value j0 value sls0 value Configuring POS SPE Scrambling Scrambling is on by defaultScramble-atm Configuring Sonet Alarms Configuring Sonet Delay Triggers AlarmAlarm Description Lais pais plop prdi slof Verifying the POS ConfigurationSlos Triggers line path millisecond Router# show protocols pos 1/0/0 LOP = PLM-P Router# show controllers pos 2/0/0 Router# show controller pos 2/0/0 detail Smdr About the ATM Uplink Interface About ATM Uplinks Catalyst Configuration Overview Configuring the ATM Uplink Interface CatalystNo loopback No atm sonet stm-1 for OC-3 No atm clock internal Initially Configuring the ATM Uplink InterfaceAtm vc-per-vp Parameter Value Configuring the Clock Source Routerconfig-if# atm sonet Configuring Sonet FramingStm-1 ATM interface or to STM-4 for the OC-12c interface Msg line j1 16byte exp-msg Overhead c2 byte j0 bytesSls0 is part of the payload pointer byte Line msg line 64byte exp-msg Configuring Loopback Configuring CDP Configuring Virtual CircuitsConfiguring the Maximum VCs per VP Creating a PVC Vpi vci aal-encap Mapping a Protocol Address to a PVCIp-address atm-vc vcd Name Verifying the ATM Configuration Switch Router aSwitch Router B 5CB About Port Snooping Configuring Interfaces About Port Snooping Restrictions on Port Snooping Configuring SnoopingAbout the Snooping Destination Port About the Snooping Source Port Source-port Direction receive transmit both Show snoop interface Monitoring SnoopingDestination-port Show snoop 78-6235-04, Cisco IOS Release 12.010W518