CISCO関連（ＴＯＰ＞ＣＩＳＣＯ＞BGP＞showコマンド）
contents
show ip bgp(bgp_03a.net) 構成A図
show ip bgp RR(bgp_03.net) 構成A図
show ip bgp (bgp_04.net) 構成B図
ベストパス選択 AS-PATH ＞ AD値
BGP table version is 5, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 0.0.0.0 0 32768 i
*> 2.2.2.2/32 192.168.1.2 0 0 200 i
*> 3.3.3.3/32 192.168.1.2 0 200 i
*> 4.4.4.4/32 192.168.1.2 0 200 i
Ra#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 2
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1
Local
0.0.0.0 from 0.0.0.0 (1.1.1.1)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Ra#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 3
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
200
192.168.1.2 from 192.168.1.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, external, best
Ra#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 4
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
200
192.168.1.2 from 192.168.1.2 (2.2.2.2)
Origin IGP, localpref 100, valid, external, best
Ra#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 5
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
200
192.168.1.2 from 192.168.1.2 (2.2.2.2)
Origin IGP, localpref 100, valid, external, best
Ra#
BGP table version is 7, local router ID is 2.2.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 192.168.1.1 0 0 100 i
*> 2.2.2.2/32 0.0.0.0 0 32768 i
r>i3.3.3.3/32 3.3.3.3 0 100 0 i
r>i4.4.4.4/32 4.4.4.4 0 100 0 i
Rb#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 2
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1
100
192.168.1.1 from 192.168.1.1 (1.1.1.1)
Origin IGP, metric 0, localpref 100, valid, external, best
Rb#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 3
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1 2
Local
0.0.0.0 from 0.0.0.0 (2.2.2.2)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Rb#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 5
Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
Advertised to update-groups:
2
Local
3.3.3.3 (metric 65) from 3.3.3.3 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rb#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 7
Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
Advertised to update-groups:
2
Local
4.4.4.4 (metric 129) from 4.4.4.4 (4.4.4.4)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rb#
BGP table version is 5, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*>i 1.1.1.1/32 192.168.1.1 0 100 0 100 i
r>i 2.2.2.2/32 2.2.2.2 0 100 0 i
*> 3.3.3.3/32 0.0.0.0 0 32768 i
r>i 4.4.4.4/32 4.4.4.4 0 100 0 i
Rc#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 3
Paths: (1 available, best #1, table default)
Not advertised to any peer
Refresh Epoch 1
100
192.168.1.1 (metric 128) from 2.2.2.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rc#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 4
Paths: (1 available, best #1, table default, RIB-failure(17))
Not advertised to any peer
Refresh Epoch 1
Local
2.2.2.2 (metric 65) from 2.2.2.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rc#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 2
Paths: (1 available, best #1, table default)
Advertised to update-groups:
1
Refresh Epoch 1
Local
0.0.0.0 from 0.0.0.0 (3.3.3.3)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Rc#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 5
Paths: (1 available, best #1, table default, RIB-failure(17))
Not advertised to any peer
Refresh Epoch 1
Local
4.4.4.4 (metric 65) from 4.4.4.4 (4.4.4.4)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rc#
BGP table version is 5, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*>i 1.1.1.1/32 192.168.1.1 0 100 0 100 i
r>i 2.2.2.2/32 2.2.2.2 0 100 0 i
r>i 3.3.3.3/32 3.3.3.3 0 100 0 i
*> 4.4.4.4/32 0.0.0.0 0 32768 i
Rd#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 2
Paths: (1 available, best #1, table default)
Not advertised to any peer
Refresh Epoch 1
100
192.168.1.1 (metric 192) from 2.2.2.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rd#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 3
Paths: (1 available, best #1, table default, RIB-failure(17))
Not advertised to any peer
Refresh Epoch 1
Local
2.2.2.2 (metric 129) from 2.2.2.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rd#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 4
Paths: (1 available, best #1, table default, RIB-failure(17))
Not advertised to any peer
Refresh Epoch 1
Local
3.3.3.3 (metric 65) from 3.3.3.3 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rd#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 5
Paths: (1 available, best #1, table default)
Advertised to update-groups:
1
Refresh Epoch 1
Local
0.0.0.0 from 0.0.0.0 (4.4.4.4)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Rd#
BGP table version is 5, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 0.0.0.0 0 32768 i
*> 2.2.2.2/32 192.168.1.2 0 0 200 i
*> 3.3.3.3/32 192.168.1.2 0 200 i
*> 4.4.4.4/32 192.168.1.2 0 200 i
Ra#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 2
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1
Local
0.0.0.0 from 0.0.0.0 (1.1.1.1)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Ra#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 3
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
200
192.168.1.2 from 192.168.1.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, external, best
Ra#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 5
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
200
192.168.1.2 from 192.168.1.2 (2.2.2.2)
Origin IGP, localpref 100, valid, external, best
Ra#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 4
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
200
192.168.1.2 from 192.168.1.2 (2.2.2.2)
Origin IGP, localpref 100, valid, external, best
Ra#
BGP table version is 7, local router ID is 2.2.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 192.168.1.1 0 0 100 i
*> 2.2.2.2/32 0.0.0.0 0 32768 i
r>i3.3.3.3/32 3.3.3.3 0 100 0 i
r>i4.4.4.4/32 4.4.4.4 0 100 0 i
Rb#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 2
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1
100
192.168.1.1 from 192.168.1.1 (1.1.1.1)
Origin IGP, metric 0, localpref 100, valid, external, best
Rb#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 3
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to update-groups:
1 2
Local
0.0.0.0 from 0.0.0.0 (2.2.2.2)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Rb#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 6
Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
Advertised to update-groups:
2
Local
3.3.3.3 (metric 65) from 3.3.3.3 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rb#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 7
Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
Advertised to update-groups:
2
Local
4.4.4.4 (metric 129) from 3.3.3.3 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best
Originator: 4.4.4.4, Cluster list: 3.3.3.3
Rb#
BGP table version is 5, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*>i 1.1.1.1/32 192.168.1.1 0 100 0 100 i
r>i 2.2.2.2/32 2.2.2.2 0 100 0 i
*> 3.3.3.3/32 0.0.0.0 0 32768 i
r>i 4.4.4.4/32 4.4.4.4 0 100 0 i
Rc#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 4
Paths: (1 available, best #1, table default)
Advertised to update-groups:
1
Refresh Epoch 1
100, (Received from a RR-client)
192.168.1.1 (metric 128) from 2.2.2.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rc#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 5
Paths: (1 available, best #1, table default, RIB-failure(17))
Advertised to update-groups:
1
Refresh Epoch 1
Local, (Received from a RR-client)
2.2.2.2 (metric 65) from 2.2.2.2 (2.2.2.2)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rc#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 2
Paths: (1 available, best #1, table default)
Advertised to update-groups:
1
Refresh Epoch 1
Local
0.0.0.0 from 0.0.0.0 (3.3.3.3)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Rc#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 3
Paths: (1 available, best #1, table default, RIB-failure(17))
Advertised to update-groups:
1
Refresh Epoch 1
Local, (Received from a RR-client)
4.4.4.4 (metric 65) from 4.4.4.4 (4.4.4.4)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rc#
BGP table version is 5, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*>i 1.1.1.1/32 192.168.1.1 0 100 0 100 i
r>i 2.2.2.2/32 2.2.2.2 0 100 0 i
r>i 3.3.3.3/32 3.3.3.3 0 100 0 i
*> 4.4.4.4/32 0.0.0.0 0 32768 i
Rd#sh ip bgp 1.1.1.1
BGP routing table entry for 1.1.1.1/32, version 4
Paths: (1 available, best #1, table default)
Not advertised to any peer
Refresh Epoch 1
100
192.168.1.1 (metric 192) from 3.3.3.3 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best
Originator: 2.2.2.2, Cluster list: 3.3.3.3
Rd#sh ip bgp 2.2.2.2
BGP routing table entry for 2.2.2.2/32, version 5
Paths: (1 available, best #1, table default, RIB-failure(17))
Not advertised to any peer
Refresh Epoch 1
Local
2.2.2.2 (metric 129) from 3.3.3.3 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best
Originator: 2.2.2.2, Cluster list: 3.3.3.3
Rd#sh ip bgp 3.3.3.3
BGP routing table entry for 3.3.3.3/32, version 3
Paths: (1 available, best #1, table default, RIB-failure(17))
Not advertised to any peer
Refresh Epoch 1
Local
3.3.3.3 (metric 65) from 3.3.3.3 (3.3.3.3)
Origin IGP, metric 0, localpref 100, valid, internal, best
Rd#sh ip bgp 4.4.4.4
BGP routing table entry for 4.4.4.4/32, version 2
Paths: (1 available, best #1, table default)
Advertised to update-groups:
1
Refresh Epoch 1
Local
0.0.0.0 from 0.0.0.0 (4.4.4.4)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
Rd#
以下の優先順に従い、AD値がeBGP(20)より大きいiBGP(200)が選択される
・AS-PATH
・eBGP ＞ iBGP （外部経路を優先する）
R2のループバックアドレス2.2.2.2/32で確認。
BGP routing table entry for 2.2.2.2/32, version 7
Paths: (2 available, best #2, table default)
Advertised to update-groups:
1
Refresh Epoch 1
101 102
10.0.14.1 from 10.0.14.1 (1.1.1.1)
Origin IGP, localpref 100, valid, external
Refresh Epoch 1
102
5.5.5.5 (metric 2) from 5.5.5.5 (5.5.5.5)
Origin IGP, metric 0, localpref 100, valid, internal, best
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGPpe 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
B 1.1.1.1 [20/0] via 10.0.14.1, 03:16:30
2.0.0.0/32 is subnetted, 1 subnets
B 2.2.2.2 [200/0] via 5.5.5.5, 03:16:30
3.0.0.0/32 is subnetted, 1 subnets
B 3.3.3.3 [20/0] via 10.0.14.1, 03:16:06
4.0.0.0/32 is subnetted, 1 subnets
C 4.4.4.4 is directly connected, Loopback0
5.0.0.0/32 is subnetted, 1 subnets
O 5.5.5.5 [110/2] via 10.0.45.5, 03:17:04, FastEthernet0/0
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 10.0.14.0/24 is directly connected, FastEthernet0/1
L 10.0.14.4/32 is directly connected, FastEthernet0/1
B 10.0.25.0/24 [200/0] via 5.5.5.5, 03:16:30
C 10.0.45.0/24 is directly connected, FastEthernet0/0
L 10.0.45.4/32 is directly connected, FastEthernet0/0
B 10.0.123.0/24 [20/0] via 10.0.14.1, 03:16:30
B 192.168.0.0/24 [20/0] via 10.0.14.1, 03:16:06
R4#sh ip bgp
BGP table version is 12, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 10.0.14.1 0 0 101 i
* 2.2.2.2/32 10.0.14.1 0 101 102 i
*>i 5.5.5.5 0 100 0 102 i
*> 3.3.3.3/32 10.0.14.1 0 101 103 i
* i 5.5.5.5 0 100 0 102 103 i
*> 4.4.4.4/32 0.0.0.0 0 32768 i
r>i 5.5.5.5/32 5.5.5.5 0 100 0 i
r> 10.0.14.0/24 10.0.14.1 0 0 101 i
* 10.0.25.0/24 10.0.14.1 0 101 102 i
*>i 5.5.5.5 0 100 0 102 i
* i 10.0.123.0/24 5.5.5.5 0 100 0 102 i
*> 10.0.14.1 0 0 101 i
*> 192.168.0.0 10.0.14.1 0 101 103 i
* i