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Loopback Testing Help

vblaha
Level 1
Level 1

Hey everyone.  I havent had to do this to often but need some assitance on running a loopback test with telco.  We have a gig link with verizon and have been asked to run a test to their loop that is facing us.  Not sure if I should select external or mac.  When I run the test do I just ping my interface while it is in loopback mode?

ASR-1000

pcf-border(config)#int gigabitEthernet 0/0/1

pcf-border(config-if)#loopback ?

  external  Loopback towards line at the transceiver level

  mac       Loopback towards system at the MAC controller level

pcf-border#sh ver

Cisco IOS Software, IOS-XE Software (PPC_LINUX_IOSD-ADVIPSERVICESK9-M), Version 12.2(33)XNF2, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2010 by Cisco Systems, Inc.

Compiled Wed 07-Jul-10 01:19 by mcpre

ROM: IOS-XE ROMMON

pcf-border uptime is 8 hours, 52 minutes

Uptime for this control processor is 8 hours, 54 minutes

System returned to ROM by reload at 23:49:38 EST Thu Feb 17 2011

System restarted at 23:52:51 EST Thu Feb 17 2011

System image file is "bootflash:/asr1000rp1-advipservicesk9.02.06.02.122-33.XNF2.bin"

Last reload reason: Reload Command

cisco ASR1002 (2RU) processor with 1735082K/6147K bytes of memory.

4 Gigabit Ethernet interfaces

32768K bytes of non-volatile configuration memory.

4194304K bytes of physical memory.

7798783K bytes of eUSB flash at bootflash:.

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