12-07-2008 10:29 PM - edited 03-04-2019 12:37 AM
How to determine the bad routes in BGP routing table?
12-08-2008 02:34 AM
Give some more details......what do you mean by BAD routes.
12-08-2008 08:56 AM
Hello Faizan,
if you mean what routes you shouldn't accept on an eBGP session describing Internet the routes that shouldn't be accepted are called bogons:
you should at least:
deny = not accept your own public prefixes
deny = not accept any private IP address as per RFC 1918
see for more information
http://www.nanog.org/mtg-0501/pdf/deitrich.pdf
if instead you mean what routes are good in a BGP table just check the first lines of show ip bgp
installed routes are also present in the routing table in the BGP table are marked as:
>*
example
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i3.0.0.0 xx.yy.5.178 70 0 701 80 i
* zz.kk.234.137 70 0 3549 701 80 i
the first path is preferred
Hope to help
Giuseppe
12-09-2008 11:12 PM
Friends,
It would be more specific if i say 'Corrupt BGP routes'.
Thanx Giuseppe for your help, it helped me a lot.
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