show ip bgp
Displays entries in the BGP routing table for one network prefix or the entire BGP routing table.
Syntax: show ip bgp [prefix-length]
prefix-length
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Display BGP information for a single network prefix.
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Description: Use the show ip bgp command to display entries in the BGP routing table.
Use the prefix-length keyword to display information for a single network prefix.
Factory Default: None.
Command Mode: Executive and privileged.
Example 1: The following is sample output from the show ip bgp command for the entire BGP routing table:
router#show ip bgp
Status codes: * - valid Origin codes: i - IGP
d - damped e - EGP
h - history ? - incomplete
s - suppressed > - best
a - aggregate
i - internal
Network Next Hop Metric LocPrf Weight Path
*> 100.0.0.0/8 5.198.4.2 0 100 0 100 ?
*> 151.1.0.0/16 5.198.4.2 0 100 0 100 ?
*>a 192.1.0.0/16 0 0 0 i
>s 192.1.1.0/24 5.198.4.2 0 100 0 100 ?
>s 192.1.2.0/24 5.198.4.2 0 100 0 100 ?
>s 192.1.3.0/24 5.198.4.2 0 100 0 100 ?
>s 192.1.4.0/24 5.198.4.2 0 100 0 100 ?
>s 192.1.13.0/24 5.198.4.2 0 100 0 100 ?
>s 192.1.14.0/24 5.198.4.2 0 100 0 100 ?
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Example 1: The following is sample output from the show ip bgp command for the network prefix :66.66.66.66
router#show ip bgp 66.66.66.66
BGP routing table entry for 66.66.66.66/32
Paths: (2 available, best #1)
66.66.66.66/32
3 i comm 65535:65281
172.16.23.3 from 172.16.23.3 (peer 3.3.3.3)
Origin IGP, local pref 100, weight 0, valid, best
BGP Path Selection Criterion: Lowest BGP Neighbor Router-ID
IGP Metric: 0 IGP Pref: 0 IGP Protocol: DIRECT
IGP Next Hop: 0.0.0.0 Route Age: 0:03:22
66.66.66.66/32 (Second best)
77 i comm 65535:65281
172.16.12.1 from 172.16.12.1 (peer 172.16.12.1)
Origin IGP, local pref 100, weight 0, valid
IGP Metric: 0 IGP Pref: 0 IGP Protocol: DIRECT
IGP Next Hop: 0.0.0.0 Route Age: 0:02:21
router#
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The following table describes the fields in the display:
Table 4-3. Fields Displayed by show ip bgp
| Field
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Description
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Status codes
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Status of the entry in the table. Valid values are:
- * - Entry is valid.
- d - Route is currently damped.
- h - Route has earned some penalty points, but not enough points to exceed threshold. See bgp dampening.
- s - Route is suppressed. See bgp dampening.
- a - Entry is an aggregate route. See aggregate-address.
- i- Entry was learned from an IGP (IS-IS or OSPF) in the local autonomous system.
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Network
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IP address of a network. Optionally includes the network mask.
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Next Hop
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IP address of the next system used when forwarding packets to the destination network. 0.0.0.0 in this field indicates the router has non-BGP routes to the network.
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Metric
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Inter-autonomous system metric.
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IGP Metric
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Specifies the IS-IS metric or OSPF cost value.
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LocPrf
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Local preference value. See the set local-preference route map configuration command. Default value is 100.
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Weight
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Weight of the route as defined by set weight and router bgp route map configuration commands.
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IGP Prtocol
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IGP Protocol: IS-IS or OSPF.
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Originator
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Specifies the router ID of the originator of the route in the local AS.
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Cluster list
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A sequence of cluster ID values representing the reflection path that the route has passed.
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Path
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Autonomous system path to the destination network. One entry in this field per autonomous system in the path.
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IGP Next-Hop
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IP address of the next system used when forwarding packets to the destination network. 0.0.0.0 in this field indicates the router has non-BGP routes to the network.
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Origin codes
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Identifies the origin of the entry. Valid values are listed below.
- i - Entry originated in IGP. Entry was advertised by the network route configuration command.
- e - Entry originated in EGP.
- ? - Entry origin is not clear. Reachability information learned from some other source (usually indicates route is redistributed from IGP into BGP).
- > - Entry identifies the best route for that network.
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Origin
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Identifies the origin of the entry as one of the following: IGP, EGP, Not clear, Best.
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Route Age
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Specifies the time in hours:minutes:seconds that a route has been valid.
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BGP path selection criteria
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Displays tie-breaking criterion for best path selection.
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Second best
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Displays second best path information.
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Related Commands: show ip bgp neighbors
show ip bgp peer-group
show ip bgp regexp
show ip bgp summary
show access-lists
show ip access-lists
show ip bgp community-list
