BGP show routines
Synopsis:
show ip bgp [ipv4-addr [mask] [longer-prefixes]]
Displays information about BGP routes installed in the BGP routing information base (RIB.)
ipv4-addrIP address entered to filter the output to display only a particular host or network in the BGP routing table.
maskMask to filter or match hosts that are part of the specified network.
longer-prefixesIf a prefix is specified, optionally specify to show routes matching the specified Network/Mask pair only.
switch(bgp)# show ip bgp Local AS : 100 Local Router-id : 10.0.102.138 Status codes: * - valid, > - best, i - internal, e - external, s - stale Origin codes: i - IGP, e - EGP, ? - incomplete Network Nexthop Metric LocalPref Weight AsPath -------------------------------------------------------------- * e 11.0.0.0/8 10.0.102.40 0 0 200 ? *>e 11.0.0.0/8 10.0.102.153 0 0 200 i *>e 22.0.0.0/8 10.0.102.40 0 0 200 ? * e 22.0.0.0/8 10.0.102.198 0 0 300 500 ? *>e 33.0.0.0/8 10.0.102.40 0 0 200 ? * e 33.0.0.0/8 10.0.102.198 0 0 300 400 ?
Synopsis:
show ip bgp ipv4-addr/masklen
Displays specific information on the route and the BGP path attributes of the route.
switch(bgp)# show ip bgp 11.0.0.0/8 Local AS : 100 Local Router-id : Network : 11.0.0.0/8 Nexthop : 10.0.102.40 Peer : 10.0.102.40 Origin : incomplete Metric : 0 Local Pref : Weight : 0 Calc. Local Pref: 100 Best : No Valid : Yes Type : external Stale : No AS-Path : 200 Communities : 200:20 100:50 Network : 11.0.0.0/8 Nexthop : 10.0.102.153 Peer : 10.0.102.153 Origin : igp Metric : 0 Local Pref : Weight : 0 Calc. Local Pref : 100 Best : Yes Valid : Yes Type : external Stale : No AS-Path : 200 Communities :
Synopsis:
show ip bgp ipv4-addr/masklen regexp aspath-reg-ex
Displays detailed information on the route if the route’s aspath information matches the supplied regular expression. This will filter both on the prefix/len and the regular expression.
switch(bgp)# show ip bgp 11.0.0.0/8 regexp 20 Local AS : 100 Local Router-id : Network : 11.0.0.0/8 Nexthop : 10.0.102.40 Peer : 10.0.102.40 Origin : incomplete Metric : 0 Local Pref : Weight : 0 Calc. Local Pref: 100 Best : No Valid : Yes Type : external Stale : No AS-Path : 200 Communities : 200:20 100:50
Synopsis:
show ip bgp [ipv4-addr]
Displays all the routes in the IP routing table, including BGP routes.
switch(bgp)# show ip route
IP Route Entries
Destination Gateway VLAN Type Sub-Type Metric Dist.
-------------------------------------------------------------------
0.0.0.0/0 10.0.0.1 1 static 1 1
10.0.0.0/16 DEFAULT_VLAN 1 connected 1 0
11.0.0.0/8 10.0.102.153 1 bgp 0 20
22.0.0.0/8 10.0.102.40 1 bgp 0 20
33.0.0.0/8 10.0.102.40 1 bgp 0 20
99.0.0.0/8 DEFAULT_VLAN 1 static 1 1
127.0.0.0/8 reject static 0 0
127.0.0.1/32 lo0 connected 1 0
Synopsis:
show ip route bgp [ipv4-addr]
Displays only the BGP routes in the IP routing table.
switch(bgp)# show ip route bgp
IP Route Entries
Destination Gateway VLAN Type Sub-Type Metric Dist.
----------------------------------------------------------------
11.0.0.0/8 10.0.102.153 1 bgp 0 20
22.0.0.0/8 10.0.102.40 1 bgp 0 20
33.0.0.0/8 10.0.102.40 1 bgp 0 20
Synopsis:
show bgp community comm-nums
Displays the list of routes who have specific communities tagged to them.
switch(bgp)# show ip community 200:20 200:30 Local AS : 100 Local Router-id : Status codes: * - valid, > - best, i - internal, e - external, s - stale Origin codes: i - IGP, e - EGP, ? - incomplete Network Nexthop Metric LocalPref Weight AsPath ------------------------------------------------------------ * e 11.0.0.0/8 10.0.102.40 0 0 200 ? *>e 33.0.0.0/8 10.0.102.40 0 0 200 ?
Synopsis:
show ip bgp community regexp community-reg-ex
Displays the routes whose community information matches the supplied regular expression.
switch(bgp)# show ip bgp community regexp “2” Local AS : 100 Local Router-id : 10.0.102.138 Status codes: * - valid, > - best, i - internal, e - external, s - stale Origin codes: i - IGP, e - EGP, ? - incomplete Network Nexthop Metric LocalPref Weight AsPath ------------------------------------------------------------ * e 11.0.0.0/8 10.0.102.40 0 0 200 ? *>e 11.0.0.0/8 10.0.102.153 0 0 200 i *>e 22.0.0.0/8 10.0.102.40 0 0 200 ?
Synopsis:
show ip bgp community comm-num... regexp aspath-reg-ex
Displays the routes whose community information matches the supplied community numbers and also the AS_PATH information matches the supplied regular expression.
switch(bgp)# show ip bgp community 20 regexp “2” Local AS : 100 Local Router-id : 10.0.102.138 Status codes: * - valid, > - best, i - internal, e - external, s - stale Origin codes: i - IGP, e - EGP, ? - incomplete Network Nexthop Metric LocalPref Weight AsPath ------------------------------------------------------------ * e 11.0.0.0/8 10.0.102.40 0 0 200 ?
Synopsis:
show ip bgp community comm-num... exact regexp aspath-reg-ex
Displays the routes whose community information matches exactly the supplied community numbers and also whose AS_PATH information matches the supplied regular expression.
switch(bgp)# show ip bgp community 200:20 100:50 exact regexp “2” Local AS : 100 Local Router-id : 10.0.102.138 Status codes: * - valid, > - best, i - internal, e - external, s - stale Origin codes: i - IGP, e - EGP, ? - incomplete Network Nexthop Metric LocalPref Weight AsPath ------------------------------------------------------------ * e 11.0.0.0/8 10.0.102.40 0 0 200 ?
Synopsis:
show ip bgp regex reg-ex
Displays all routes whose AS_PATH matches the regular-expression given.
switch(bgp)# show ip bgp regexp “^300" Local AS : 100 Local Router-id : Status codes: * - valid, > - best, i - internal, e - external, s - stale Origin codes: i - IGP, e - EGP, ? - incomplete Network Nexthop Metric LocalPref Weight AsPath ------------------------------------------------------------ * e 22.0.0.0/8 10.0.102.198 0 0 300 500 ? * e 33.0.0.0/8 10.0.102.198 0 0 300 400 ?
Synopsis:
show ip bgp [ipv4-addr/masklen [longer-prefix]] route community
Displays basic route information (destination and nexthop) and the communities tagged to the route in full. This show routine is especially helpful when you want to look at the communities that are tagged to all routes at a glance.
switch(bgp)# show ip bgp 22.0.0.0/8 route community Local AS : 100 Local Router-id : Status codes: * - valid, > - best, i - internal, e - external, s - stale Origin codes: i - IGP, e - EGP, ? - incomplete Network Nexthop Community ------------------------------------------------------------ *>e 22.0.0.0/8 10.0.102.40 200:20 100:50 ? *e 22.0.0.0/8 10.0.102.198 no-export ?
Synopsis:
show ip bgp neighbor [ipv4-addr]
Displays information about the state of BGP’s IPv4 peering sessions.
switch(bgp)# show ip bgp neighbor 10.0.102.40
BGP Neighbor 10.0.102.40
BGP Version : 4
Remote Router ID : 10.0.102.40 Local Router ID :10.0.102.138
Remote-AS : 200 Local-AS : 100
Remote Port : 179 Local Port : 56126
State : Established Up Time : 0h:3m:29s
Admin Status : Start Link Type : External
Conn Established : 1 Conn Dropped : 0
Last Read : 0h:0m:29s Last Write : 0h:0m:29s
Last reset time : 0h:0m:0s Error Subcode Sent : 0
Last reset reason: Never Gr. Restart Time : 120 secs.
MAXIMUM Prefix : 4294967295 Send Community : Yes
Weight : 0 RtReflectorClient : No
Use MED : Yes Passive : No
AS-Override : No Allow-AS in : 0
Ignore Lead AS : No Out-Delay : 0
Remove Private AS : No Ttl : 1
Update Source :
Route-Map-In :
Route-Map-Out :
Password :
Cfg. Hold Time : 180 Cfg. Keep Alive : 60
Neg. Hold Time : 180 Neg. Keep Alive : 60
Capability Announced Received
------------------------------ --------- --------
Route Refresh No Yes
Dynamic No No
Graceful Restart (ipv4-uni) Yes No
Multi-protocol (ipv4-uni) Yes Yes
Message Type Sent Received
------------------------------ --------- --------
Opens 1 1
Notifications 0 0
Capability 0 0
Updates 1 1
Keepalives 4 4
Route Refresh 0 0
Total 6 6
Prefix Activity Sent Received
------------------------------ --------- --------
Prefixes Current 1 3
Prefixes Total 1 3
Implicit Withdraw 0 0
Explicit Withdraw 0 0
Used as BestPath n/a 2
Local Policy Denied Prefixes Outbound Inbound
------------------------------ --------- --------
Routemap 0 0
Bad lead AS n/a 0
Exceeded Max-prefix n/a 0
Exceeded Allow-as in n/a 0
Total 0 0
Max Min
--------- --------
Number of NLRIs in the update sent 1 0
Synopsis:
show ip bgp as-path
Displays the list of AS_PATHs that BGP has learned from the routing information it has received.
switch# show ip bgp as-path BGP AS-Path Information AS Path Metric RefCount ----------------------------------------- ---------- ----- I 0 4 ? 0 3 200 i 0 2 300 ? 250 2
Synopsis:
show ip bgp redistribute
Displays the list of protocols whose routes are being redistributed into BGP.
switch# show ip bgp redistribute Route type RouteMap ---------- -------------------------------------------------- static rtmap-static rip
Synopsis:
show ip bgp summary
Displays a summarized view of global BGP configuration and current BGP neighbor peering state.