[c-nsp] Cisco 7609 packet punted to CPU

[krunal shah]

We have issue that I have been dealing with TAC engineer from last 3 weeks
now.

Platform is Cisco 7609 with 15(3)S3 advipservice with all 6708 DFC3CXL line
card running MPLS and full BGP table imported into a VRF.

We are getting traffic punted to CPU from one specific line card. We
replaced the line card and still getting same issue.

Looking at some CLI

remote command module 1 show mls cef mpls | ex drop

shows all MPLS lables as punt but same lables from other line cards and SP
are showing recirc

#remote command module 1 show mls cef mpls | ex drop

#remote command module 2 show mls cef mpls label 16
Codes: + - Push label, - - Pop Label * - Swap Label, E - exp1
Index  LocalLabel  Out i/f
   Label Op
2323   16  (EOS)(-)recirc

#remote command module 1 show mls cef mpls label 16

Codes: + - Push label, - - Pop Label * - Swap Label, E - exp1
Index  LocalLabel  Out i/f
   Label Op
12264  16  (EOS)   punt


Has anyone run into this issue before and what could have trigger this and
how to fix it?

Krunal
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Re: [c-nsp] ASR9K - 6PE packets punted to RP

[Aaron Gould]

Thanks James...they mention it's the changing of the v6 next-hop from
recursive to non-recursive or vice versa that causes an issue

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuo20651

I see 6VPE is also mentioned as possibly affected.  Seems like I'm not
completely safe since I run 6VPE   :|

-Aaron


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Re: [c-nsp] ASR9K - 6PE packets punted to RP

[James Jun]

On Wed, Jul 12, 2017 at 10:54:08AM -0500, Aaron Gould wrote:
> I've tested and running in some places dual-stacked over MPLS L3VPN
> (6*V*PE)... I haven't seen any problems with 6VPE via my ASR9k's as of
> yet... just thought I'd let you know in case you could go with 6VPE rather
> than 6PE and avoid your issues.  Just a thought.  Sorry I don't have info
> about 6PE and punting issues.
> 
> -Aaron
> 

Yea, I do have 6VPE deployed on the other network that we run, and there are no 
problems there. 

As for 6PE problems I'm having now..

TAC hasn't gotten back to us yet, but on the other somewhat related bug seems 
to be CSCuo20651 affecting both v4 and v6 labeled-ucast.
It suggests doing 'clear route ipv6 unicast' as a workaround to force 
reprogramming of v6 (6pe included) routes into FIB.  

James
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Re: [c-nsp] ASR9K - 6PE packets punted to RP

[Aaron Gould]

I've tested and running in some places dual-stacked over MPLS L3VPN
(6*V*PE)... I haven't seen any problems with 6VPE via my ASR9k's as of
yet... just thought I'd let you know in case you could go with 6VPE rather
than 6PE and avoid your issues.  Just a thought.  Sorry I don't have info
about 6PE and punting issues.

-Aaron


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[c-nsp] ASR9K - 6PE packets punted to RP

[James Jun]

Hello list,

Has anybody else been running into CSCtw62709 on ASR9K? ("Labeled IPv6 packets 
are punted to CPU")

We're running into this problem where on ASR9010 PE running XR 5.1.3, 6PE 
packets are getting MDF_PUNT_POLICE'd into LPTS.
Strangely, the bug search tool shows known affected release is 4.2.0, not 5.x 
and it's affecting 5.1.3; and, no known fixed releases?

I've opened a TAC case to get more details, but was wondering if anyone else 
had similar issues with 6PE getting punted to RP?

James
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Re: [c-nsp] STM-1 over MPLS using ASR920

[George Giannousopoulos]

Hi,

My understanding is that the OC3 module must be used when you need to
transport channelized STM-1 or when you need to terminate multiple E1
circuits to a single STM-1 interface.
I think TSOP Smart SFP supports only clear channel STM-1.

I'm currently testing both scenarios and I'll be able to provide some
feedback within the next two weeks

--
George

On Wed, Jul 12, 2017 at 10:40 AM, Lukas Tribus  wrote:

> > This it ?
>
> The below. Looking for feedback from the field.
>
>
> TsoP Smart SFP [2]:
> ONS-SC-155-TSOP -> “TSoP Smart SFP” da inserire in uno slot SFP 1GE nel
> ASR920
>
> TsoP in OC3 module [1], [2]:
> Modulo A900-IMA4OS + SFP OC3 ONS-SI-155-I1 -> qua occupiamo lo slot nel
> ASR920
>
> VCoP Smart SFP [3]:
> ONS-SI-OC-VCOP: VCoP Smart SFP 155/622 in SFP o SFP+.
>
> Vedi anche:
> [1] ASR920 High-Port-Density Models Data Sheet
> http://www.cisco.com/c/en/us/products/collateral/routers/
> asr-920-series-aggregation-services-router/datasheet-c78-733397.html
>
> [2] ASR920 TDM Configuration Guide: Transparent SONET or SDH over Packet
> (TSoP) Protocol
> http://www.cisco.com/c/en/us/td/docs/routers/asr920/
> configuration/guide/tdm/tdm-asr920-book/tdm-asr920-book_chapter_0100.html
>
> [3] ASR920 TDM Configuration Guide: Configuring VCoP Smart SFP
> https://www.cisco.com/c/en/us/td/docs/routers/asr920/
> configuration/guide/tdm/tdm-asr920-book/tdm-asr920-book_chapter_0101.html
>
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Re: [c-nsp] STM-1 over MPLS using ASR920

[Lukas Tribus]

> This it ?

The below. Looking for feedback from the field.


TsoP Smart SFP [2]:
ONS-SC-155-TSOP -> “TSoP Smart SFP” da inserire in uno slot SFP 1GE nel ASR920

TsoP in OC3 module [1], [2]:
Modulo A900-IMA4OS + SFP OC3 ONS-SI-155-I1 -> qua occupiamo lo slot nel ASR920

VCoP Smart SFP [3]:
ONS-SI-OC-VCOP: VCoP Smart SFP 155/622 in SFP o SFP+.

Vedi anche:
[1] ASR920 High-Port-Density Models Data Sheet
http://www.cisco.com/c/en/us/products/collateral/routers/asr-920-series-aggregation-services-router/datasheet-c78-733397.html

[2] ASR920 TDM Configuration Guide: Transparent SONET or SDH over Packet (TSoP) 
Protocol
http://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/tdm/tdm-asr920-book/tdm-asr920-book_chapter_0100.html

[3] ASR920 TDM Configuration Guide: Configuring VCoP Smart SFP
https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/tdm/tdm-asr920-book/tdm-asr920-book_chapter_0101.html
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