[c-nsp] Deny default route (From customer - BGP)

Fredrik Lönnman fredrik at lonnman.se
Tue Mar 10 02:06:20 EDT 2015


show ip bgp nei xyz received-routes will give you the routes as you
received them _before_ your own filtering. Use show ip bgp nei xyz routes
instead.

Regards,
Fredrik

On 10 March 2015 at 03:40, CiscoNSP List <cisconsp_list at hotmail.com> wrote:

> Hi Everyone,
>
> Only had a few hours sleep, so I may be overlooking something extremely
> obvious...but we are receiving a default from a customer, even though
> route-map/prefix list *should* block it...
> router bgp xxx
> ...
> address-family ipv4
> ...
> neighbor CUST_A route-map CUST_A-BGP-IN in
>
> ip prefix-list PL_DENY_DEFAULT seq 5 permit 0.0.0.0/0
> ip prefix-list PL_CUST_A_BGP_PREFIXES seq 5 permit xxx.xxx.xxx.0/24
>
> route-map CUST_A-BGP-IN deny 5
> match ip address prefix-list PL_DENY_DEFAULT
> route-map CUST_A-BGP-IN permit 10
>  match ip address prefix-list PL_CUST_A_BGP_PREFIXES
>  set community xxxxx:1400
>
> Weird thing is, that "sh ip bgp summary" shows that neighbour as only
> having 1 in "State/PfxRcd"
>
> but "sh ip bgp nei xxx.xxx.xx.xx received-routes" shows the neighbour with
> 0.0.0.0 and there single /24
>
> Cheers for any help.
>
>
>
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