[c-nsp] BGP announcing route with no subnet mask

[Sascha E. Pollok]

Hello Andy,

> ip route 193.x.x.0 255.255.255.0 Null0 200 tag 200
[...]
> CSW01#sh ip bgp neighbors <border router peer IP> advertised-routes | i 
> 193.x.x.0
> *> 193.x.x.0    0.0.0.0                  0         32768 i
>
> The route is visible via one transit provider + our peers (showing the 
> correct /24 subnet mask):
>
> route-server# sh ip bgp 193.x.x.0
> BGP routing table entry for 193.x.x.0/24

Some routers do not show the subnet mask when the network is announced
with the "natural size" (classful) netmask (193.x.x.0 -> Class C -> /24).

Cheers
Sascha