14-7 show ip bgp prefixmask-length

14-7 show ip bgp prefix/mask-length

Syntax Description:

• prefix ” IP address of the prefix to display.

• mask ” Display prefix with a specific network mask.

• mask-length ” Bit length of the mask.

Purpose: To display the contents of the local BGP routing table for a specific prefix with a specific mask.

Cisco IOS Software Release: 10.0

Example: Display a Specific Prefix from the BGP Routing Table with the Specified Mask

The following is some sample output from the show ip bgp prefix mask command. First, list the entire contents of the BGP routing table:

 rtrA#  show ip bgp  BGP table version is 90, local router ID is 199.172.15.1 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 *> 199.172.1.0      0.0.0.0                  0         32768 i s> 199.172.2.0      0.0.0.0                  0         32768 i *> 199.172.2.0/23   0.0.0.0                            32768 i s> 199.172.3.0      0.0.0.0                  0         32768 i *> 199.172.4.0      0.0.0.0                  0         32768 i *> 200.1.1.0        172.17.1.1               0             0 2 i *> 200.1.2.0        172.17.1.1               0             0 2 i *> 200.1.3.0        172.17.1.1               0             0 2 i *> 200.1.4.0        172.17.1.1               0             0 2 i 

Now list entries for the prefix 199.172.2.0 having a mask equal to 24 bits:

 rtrA#  show ip bgp 199.172.1.0 255.255.255.0  BGP routing table entry for 199.172.1.0/24, version 6 Paths: (1 available, best #1)   Advertised to non peer-group peers:     172.17.1.1   Local     0.0.0.0 from 0.0.0.0 (199.172.15.1)       Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best, ref 2