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Syntax Description:

• prefix— IP address of the prefix to display.

• mask— Display prefix with a specific network mask.

• line— Regular expression. See Appendix B.

• mask-length— Bit length of the mask.

Purpose: To display the contents of the local BGP routing table for a specific prefix or a specific prefix/mask using output modifiers.

Cisco IOS Software Release: 10.0

Example: Display a Specific Prefix from the BGP Routing Table Using Output Modifiers

The following is some sample output from the show ip bgp prefix mask longer-prefixes | include line command. First, list the entire 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

Next, list all the entries for the prefix 199.172.2.0:

rtrA#show ip bgp 199.172.2.0 255.255.254.0 longer-prefixes

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

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

List only the suppressed entries for the 199.172.2.0 prefixes:

rtrA#show ip bgp 199.172.2.0 255.255.254.0 longer-prefixes | include s

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

s> 199.172.2.0      0.0.0.0                  0         32768 i

s> 199.172.3.0      0.0.0.0                  0         32768 I

Finally, list only the unsuppressed entries for the 199.172.2.0 prefixes:

rtrA#show ip bgp 199.172.2.0 255.255.254.0 longer-prefixes | exclude s



   Network          Next Hop            Metric LocPrf Weight Path

*> 199.172.2.0/23   0.0.0.0                            32768 I

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