[rbak-nsp] strange BGP printouts...

Ron Ripley ripleyron at gmail.com
Fri Jan 13 15:56:14 EST 2012


Hi,

The "i" at the end of the AS Path; refers to the origin of an IGP, not iBGP.  Origin codes: i - IGP, e - EGP, ? - incomplete

Ron

On 2012-01-13, at 5:58 AM, Ronald Voermans wrote:

> Hi Marcin,
> 
> the first one is seen as an internal neighbour (ibgp), hence the 'i' in the path. No as-path is neccessary with ibgp!
> 
> Regards,
> Ronald
> 
> Op 13 jan. 2012, om 13:53 heeft Marcin Kuczera het volgende geschreven:
> 
>> look here, I have 2 peers with exacly the same route-maps
>> 
>> Neighbor              AS  MsgRcvd  MsgSent    TblVer  InQ OutQ Rst Up/Down  PfxRcvd/Sent  RstNeeded
>> 91.195.159.6       30799       91      102  24923197    0    0   1 01:24:59      4    274        No
>> 91.195.159.10     196858    18964    18991  24923213    0    0   2 1w6d      3    272        No
>> 
>> 
>> Now, look at example of advertised routes:
>> 
>> 
>> [bgp1]R0_SE600#show bgp route neighbor 91.195.159.6 advertised
>> Address Family: ipv4 unicast
>> BGP table version is 24923469, local router ID is 195.66.73.250
>> Status codes: d damped, h history, > best, i internal
>> Origin codes: i - IGP, e - EGP, ? - incomplete
>> 
>> Network            Next Hop                Metric  LocPrf  Weight Path
>>> 31.11.128.0/17     91.195.159.5                 0     600     100 i
>>> 37.8.192.0/18      91.195.159.5                 0     600     100 i
>>> 77.222.224.0/21    91.195.159.5                 0     600     100 i
>>> 77.222.232.0/21    91.195.159.5                 0     600     100 i
>>> 77.222.240.0/20    91.195.159.5                 0     600     100 i
>>> 78.31.136.0/21     91.195.159.5                 0     600     100 i
>>> 78.88.0.0/20       91.195.159.5                 0     600     100 i
>>> 78.88.16.0/22      91.195.159.5                 0     600     100 i
>>> 78.88.20.0/23      91.195.159.5                 0     600     100 i
>>> 78.88.22.0/23      91.195.159.5                 0     600     100 i
>>> 78.88.24.0/21      91.195.159.5                 0     600     100 i
>>> 78.88.32.0/21      91.195.159.5                 0     600     100 i
>>> 78.88.40.0/23      91.195.159.5                 0     600     100 i
>>> 78.88.43.0/24      91.195.159.5                 0     600     100 i
>>> 78.88.48.0/21      91.195.159.5                 0     600     100 i
>>> 78.88.56.0/21      91.195.159.5                 0     600     100 i
>>> 78.88.64.0/21      91.195.159.5                 0     600     100 i
>>> 78.88.72.0/21      91.195.159.5                 0     600     100 i
>>> 78.88.80.0/22      91.195.159.5                 0     600     100 i
>>> 78.88.84.0/22      91.195.159.5                 0     600     100 i
>>> 78.88.88.0/23      91.195.159.5                 0     600     100 i
>>> 78.88.90.0/23      91.195.159.5                 0     600     100 i
>>> 78.88.92.0/24      91.195.159.5                 0     600     100 i
>>> 78.88.93.0/24      91.195.159.5                 0     600     100 i
>>> 78.88.96.0/21      91.195.159.5                 0     600     100 i
>>> 78.88.106.0/23     91.195.159.5                 0     600     100 i
>>> 78.88.108.0/24     91.195.159.5                 0     600     100 i
>>> 78.88.109.0/24     91.195.159.5                 0     600     100 i
>>> 78.88.110.0/23     91.195.159.5                 0     600     100 i
>>> 78.88.112.0/21     91.195.159.5                 0     600     100 i
>> [bgp1]R0_SE600#show bgp route neighbor 91.195.159.10 advertised
>> Address Family: ipv4 unicast
>> BGP table version is 24923504, local router ID is 195.66.73.250
>> Status codes: d damped, h history, > best, i internal
>> Origin codes: i - IGP, e - EGP, ? - incomplete
>> 
>> Network            Next Hop                Metric  LocPrf  Weight Path
>>> 31.11.128.0/17     91.195.159.9                 0     600     100 13000 29314 i
>>> 37.8.192.0/18      91.195.159.9                 0     600     100 13000 29314 i
>>> 77.222.224.0/21    91.195.159.9                 0     600     100 13000 29314 i
>>> 77.222.232.0/21    91.195.159.9                 0     600     100 13000 29314 i
>>> 77.222.240.0/20    91.195.159.9                 0     600     100 13000 29314 i
>>> 78.31.136.0/21     91.195.159.9                 0     600     100 13000 44124 i
>>> 78.88.0.0/20       91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.16.0/22      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.20.0/23      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.22.0/23      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.24.0/21      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.32.0/21      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.40.0/23      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.43.0/24      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.48.0/21      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.56.0/21      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.64.0/21      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.72.0/21      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.80.0/22      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.84.0/22      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.88.0/23      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.90.0/23      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.92.0/24      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.93.0/24      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.96.0/21      91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.106.0/23     91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.108.0/24     91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.109.0/24     91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.110.0/23     91.195.159.9                 0     600     100 13000 29314 i
>>> 78.88.112.0/21     91.195.159.9                 0     600     100 13000 29314 i
>> [bgp1]R0_SE600#
>> 
>> 
>> the first one is strange, because it looks like AS path is missing.
>> Is it a random bug ?
>> 
>> Regards,
>> Marcin
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>> 
> 
> 
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