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5
Helpful
2
Replies
jaggy_learner
Beginner

ethernet dataplan loopback not supported

Hi Genius,

 

I am not able to configure external loop can someone help.


ASR-9001-ROUTER(config-subif)#show configuration failed
Thu Jun 24 16:54:05.907 IST
!! SEMANTIC ERRORS: This configuration was rejected by
!! the system due to semantic errors. The individual
!! errors with each failed configuration command can be
!! found below.


interface GigabitEthernet0/0/1/14.156 l2transport
ethernet loopback
permit internal
!!% 'Ethernet Loopback' detected the 'warning' condition 'Loopback is not supported on this interface type in this direction.'
!
!
end

ASR-9001-ROUTER(config-subif)#do show version brief
Thu Jun 24 16:55:04.093 IST

Cisco IOS XR Software, Version 5.1.2[Default]
Copyright (c) 2014 by Cisco Systems, Inc.

ROM: System Bootstrap, Version 2.04(20140227:092320) [ASR9K ROMMON],

ASR-9001-ROUTER uptime is 6 years, 13 weeks, 6 days, 16 hours, 55 minutes
System image file is "bootflash:disk0/asr9k-os-mbi-5.1.2.CSCur21570-1.0.0/0x100000/mbiasr9k-rp.vm"

cisco ASR9K Series (P4040) processor with 8388608K bytes of memory.
P4040 processor at 1500MHz, Revision 2.0
ASR-9001 Chassis

2 Management Ethernet
20 GigabitEthernet
4 TenGigE
4 DWDM controller(s)
4 WANPHY controller(s)
219k bytes of non-volatile configuration memory.
2868M bytes of hard disk.
3915760k bytes of disk0: (Sector size 512 bytes).
ASR-9001-ROUTER(config-subif)#

1 ACCEPTED SOLUTION

Accepted Solutions
tkarnani
Cisco Employee

Hi , I tried this in our lab, it seems to work.

i configured this on an ASR9000 running 5.3.3

 

RP/0/RSP0/CPU0:ASR-9001-A(config)#int Gi0/0/1/17
RP/0/RSP0/CPU0:ASR-9001-A(config-if)#loopback internal
RP/0/RSP0/CPU0:ASR-9001-A(config-if)#commit
Thu Jun 24 21:34:38.749 GMT
RP/0/RSP0/CPU0:ASR-9001-A(config-if)#exit
RP/0/RSP0/CPU0:ASR-9001-A(config)#interface  gigabitEthernet 0/0/1/17.100 l2tr$
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#encapsulation dot1q 100
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#rewrite ingress tag pop 1 symmetric
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#commit
Thu Jun 24 21:35:01.794 GMT
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#ethernet loopback
RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#permit internal
RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#commit
Thu Jun 24 21:35:08.402 GMT
RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#do show version
Thu Jun 24 21:35:14.667 GMT

RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#do show version
Thu Jun 24 21:35:22.012 GMT

Cisco IOS XR Software, Version 5.3.3[Default]
Copyright (c) 2021 by Cisco Systems, Inc.

ROM: System Bootstrap, Version 2.01(20130627:172232) [ASR9K ROMMON],

ASR-9001-A uptime is 2 weeks, 2 days, 11 hours, 40 minutes
System image file is "bootflash:disk0/asr9k-os-mbi-5.3.3.sp12-1.0.0/0x100000/mbiasr9k-rp.vm"

cisco ASR9K Series (P4040) processor with 8388608K bytes of memory.
P4040 processor at 1500MHz, Revision 2.0

 i have found a router in our lab running 5.1.3, it fails

 

RP/0/RSP0/CPU0:ASR9001-K(config)#int Te0/0/2/2
RP/0/RSP0/CPU0:ASR9001-K(config-if)#loopback internal
RP/0/RSP0/CPU0:ASR9001-K(config-if)#commit
Thu Jun 24 05:23:19.744 UTC
RP/0/RSP0/CPU0:ASR9001-K(config-if)#exit
RP/0/RSP0/CPU0:ASR9001-K(config)#int Te0/0/2/2.100 l2transport
RP/0/RSP0/CPU0:ASR9001-K(config-subif)#ethernet loopback
RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#permit internal
RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#commit
Thu Jun 24 05:23:36.986 UTC

% Failed to commit one or more configuration items during a pseudo-atomic operat                              ion. All changes made have been reverted. Please issue 'show configuration faile                              d [inheritance]' from this session to view the errors
RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#show configuration failed
Thu Jun 24 05:23:41.392 UTC
!! SEMANTIC ERRORS: This configuration was rejected by
!! the system due to semantic errors. The individual
!! errors with each failed configuration command can be
!! found below.


interface TenGigE0/0/2/2.100 l2transport
 ethernet loopback
  permit internal
!!% 'Ethernet Loopback' detected the 'warning' condition 'Loopback is not suppor                              ted on this interface type in this direction.'
 !
!
end

RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#do show ver
Thu Jun 24 05:23:52.538 UTC

Cisco IOS XR Software, Version 5.1.3[Default]
Copyright (c) 2014 by Cisco Systems, Inc.

ROM: System Bootstrap, Version 2.04(20140424:063844) [ASR9K ROMMON],

ASR9001-K uptime is 34 weeks, 1 day, 22 hours, 35 minutes
System image file is "bootflash:disk0/asr9k-os-mbi-5.1.3.CSCur18995-1.0.0/0x100000/mbiasr9k-rp.vm"

cisco ASR9K Series (P4040) processor with 8388608K bytes of memory.
P4040 processor at 1500MHz, Revision 3.0
ASR-9001 Chassis

2 Management Ethernet
4 TenGigE
4 DWDM controller(s)
4 WANPHY controller(s)
219k bytes of non-volatile configuration memory.
2868M bytes of hard disk.
3915760k bytes of disk0: (Sector size 512 bytes).

Configuration register on node 0/RSP0/CPU0 is 0x2102
Boot device on node 0/RSP0/CPU0 is disk0:
Package active on node 0/RSP0/CPU0:
iosxr-security-5.1.3.CSCur54568, V 1.0.0[SMU], Cisco Systems, at disk0:iosxr-security-5.1.3.CSCur54568-1.0.0
    Built on Thu Nov 27 13:16:46 UTC 2014
    By iox-lnx-008 in /san1/smu/EFR/smu_r51x_5_1_3/workspace for pie

asr9k-px-5.1.3.CSCur54568, V 1.0.0[SMU], Cisco Systems, at disk0:asr9k-px-5.1.3.CSCur54568-1.0.0
    Built on Thu Nov 27 13:16:48 UTC 2014
    By iox-lnx-008 in /san1/smu/EFR/smu_r51x_5_1_3/workspace for pie

 --More--
Cisco IOS XR Software, Version 5.1.3[Default]
Copyright (c) 2014 by Cisco Systems, Inc.

 

 

it looks like there was a change in version, newer versions seem to work.

the older one has an issue, are you able to upgrade?

 

Thanks

View solution in original post

2 REPLIES 2
tkarnani
Cisco Employee

Hi , I tried this in our lab, it seems to work.

i configured this on an ASR9000 running 5.3.3

 

RP/0/RSP0/CPU0:ASR-9001-A(config)#int Gi0/0/1/17
RP/0/RSP0/CPU0:ASR-9001-A(config-if)#loopback internal
RP/0/RSP0/CPU0:ASR-9001-A(config-if)#commit
Thu Jun 24 21:34:38.749 GMT
RP/0/RSP0/CPU0:ASR-9001-A(config-if)#exit
RP/0/RSP0/CPU0:ASR-9001-A(config)#interface  gigabitEthernet 0/0/1/17.100 l2tr$
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#encapsulation dot1q 100
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#rewrite ingress tag pop 1 symmetric
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#commit
Thu Jun 24 21:35:01.794 GMT
RP/0/RSP0/CPU0:ASR-9001-A(config-subif)#ethernet loopback
RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#permit internal
RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#commit
Thu Jun 24 21:35:08.402 GMT
RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#do show version
Thu Jun 24 21:35:14.667 GMT

RP/0/RSP0/CPU0:ASR-9001-A(config-if-ethlb)#do show version
Thu Jun 24 21:35:22.012 GMT

Cisco IOS XR Software, Version 5.3.3[Default]
Copyright (c) 2021 by Cisco Systems, Inc.

ROM: System Bootstrap, Version 2.01(20130627:172232) [ASR9K ROMMON],

ASR-9001-A uptime is 2 weeks, 2 days, 11 hours, 40 minutes
System image file is "bootflash:disk0/asr9k-os-mbi-5.3.3.sp12-1.0.0/0x100000/mbiasr9k-rp.vm"

cisco ASR9K Series (P4040) processor with 8388608K bytes of memory.
P4040 processor at 1500MHz, Revision 2.0

 i have found a router in our lab running 5.1.3, it fails

 

RP/0/RSP0/CPU0:ASR9001-K(config)#int Te0/0/2/2
RP/0/RSP0/CPU0:ASR9001-K(config-if)#loopback internal
RP/0/RSP0/CPU0:ASR9001-K(config-if)#commit
Thu Jun 24 05:23:19.744 UTC
RP/0/RSP0/CPU0:ASR9001-K(config-if)#exit
RP/0/RSP0/CPU0:ASR9001-K(config)#int Te0/0/2/2.100 l2transport
RP/0/RSP0/CPU0:ASR9001-K(config-subif)#ethernet loopback
RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#permit internal
RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#commit
Thu Jun 24 05:23:36.986 UTC

% Failed to commit one or more configuration items during a pseudo-atomic operat                              ion. All changes made have been reverted. Please issue 'show configuration faile                              d [inheritance]' from this session to view the errors
RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#show configuration failed
Thu Jun 24 05:23:41.392 UTC
!! SEMANTIC ERRORS: This configuration was rejected by
!! the system due to semantic errors. The individual
!! errors with each failed configuration command can be
!! found below.


interface TenGigE0/0/2/2.100 l2transport
 ethernet loopback
  permit internal
!!% 'Ethernet Loopback' detected the 'warning' condition 'Loopback is not suppor                              ted on this interface type in this direction.'
 !
!
end

RP/0/RSP0/CPU0:ASR9001-K(config-if-ethlb)#do show ver
Thu Jun 24 05:23:52.538 UTC

Cisco IOS XR Software, Version 5.1.3[Default]
Copyright (c) 2014 by Cisco Systems, Inc.

ROM: System Bootstrap, Version 2.04(20140424:063844) [ASR9K ROMMON],

ASR9001-K uptime is 34 weeks, 1 day, 22 hours, 35 minutes
System image file is "bootflash:disk0/asr9k-os-mbi-5.1.3.CSCur18995-1.0.0/0x100000/mbiasr9k-rp.vm"

cisco ASR9K Series (P4040) processor with 8388608K bytes of memory.
P4040 processor at 1500MHz, Revision 3.0
ASR-9001 Chassis

2 Management Ethernet
4 TenGigE
4 DWDM controller(s)
4 WANPHY controller(s)
219k bytes of non-volatile configuration memory.
2868M bytes of hard disk.
3915760k bytes of disk0: (Sector size 512 bytes).

Configuration register on node 0/RSP0/CPU0 is 0x2102
Boot device on node 0/RSP0/CPU0 is disk0:
Package active on node 0/RSP0/CPU0:
iosxr-security-5.1.3.CSCur54568, V 1.0.0[SMU], Cisco Systems, at disk0:iosxr-security-5.1.3.CSCur54568-1.0.0
    Built on Thu Nov 27 13:16:46 UTC 2014
    By iox-lnx-008 in /san1/smu/EFR/smu_r51x_5_1_3/workspace for pie

asr9k-px-5.1.3.CSCur54568, V 1.0.0[SMU], Cisco Systems, at disk0:asr9k-px-5.1.3.CSCur54568-1.0.0
    Built on Thu Nov 27 13:16:48 UTC 2014
    By iox-lnx-008 in /san1/smu/EFR/smu_r51x_5_1_3/workspace for pie

 --More--
Cisco IOS XR Software, Version 5.1.3[Default]
Copyright (c) 2014 by Cisco Systems, Inc.

 

 

it looks like there was a change in version, newer versions seem to work.

the older one has an issue, are you able to upgrade?

 

Thanks

View solution in original post

smilstea
Cisco Employee

Internal loopback was added in 5.2.2.

 

 

5.1.0

  • Only External Loopback Suported
  • Local interface (i.e. can’t initiate remotely)
  • Interface Support
  • Physical interfaces
  • Sub-interfaces
  • Bundle interfaces
  • Pseudowire Head End (PWHE) interfaces.
  • BVI not supported
  • Layer 2 filtering only.
  • Typhoon LCs

5.2.2

  • Internal Loopback Supported
  • Satellite Support with EDPL Internal

 

Sam