Re: BGP malformed update/attribute list

[Randy Bush via NANOG <nanog () lists nanog org>]

> You can use the CLI exec command
>
> "show bgp update in error"
> to display the update and analyze it further.

    RP/0/RSP0/CPU0:r2.dfw#show bgp update in error detail 

    VRF "default"
      Malformed Update messages: 19
      Neighbors that received malformed Update messages: 2
      Last malformed update received: May 20 07:02:30.421 (2d13h ago)

there was much more data in the log message

> > May 20 07:01:51 r2.f00 16869308: RP/0/RSP0/CPU0:May 20 07:01:51.437 : bgp[1059]: %ROUTING-BGP-3-MALFORM_UPDATE : 
> > Malformed UPDATE message received from neighbor 123.45.67.89 (VRF: default) - message length 106 bytes, error flags 
> > 0x000c0000, action taken "DiscardAttr". Error details: "Error 0x00040000, Field "Attr-length", Attribute 40 (Flags 
> > 0xe0, Length 28), Data [e0281c]". NLRIs: [IPv4 Unicast] 45.198.25.0/24

but the timestamps differ a bit

randy
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