Information Technology Reference
In-Depth Information
Example 9-20
BGP Routes Marked in the Routing Table
R7#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, 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
B - BGP
Gateway of last resort is not set
B 222.222.222.0/24 [200/0] via 172.16.64.1
B 222.222.222.0/24 [200/0] via 172.16.64.1, 1d03h
155.55.0.0/24 is subnetted, 1 subnets
B 155.55.55.0 [200/0] via 172.16.64.1, 1d03h
18.0.0.0/24 is subnetted, 1 subnets
B 18.88.88.0 [20/0] via 78.1.1.8, 1d22h
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
B 172.16.1.0/24 [20/0] via 78.1.1.8, 1d22h
R 172.16.64.0/25 [120/2] via 79.7.7.9, 00:00:01, Ethernet0
7.0.0.0/32 is subnetted, 1 subnets
C 78.1.1.0 is directly connected, Serial1
109.0.0.0/24 is subnetted, 1 subnets
R 109.1.1.0 [120/1] via 79.7.7.9, 00:00:04, Ethernet0
79.0.0.0/24 is subnetted, 1 subnets
C 79.7.7.0 is directly connected, Ethernet0
B 199.99.99.0/24 [200/0] via 9.9.9.9, 1d22h
B 18.88.88.0 [20/0] via 78.1.1.8
B 172.16.1.0/24 [20/0]
B 199.99.99.0/24 [200/0] via 9.9.9.9
References Used
The following resources were used to create this chapter:
Routing TCP/IP
, Volume II, Jeff Doyle/Jennifer DeHaven Carroll, Cisco Press, 2001
RFC 1771, “A Border Gateway Protocol 4.” Y. Rekhter, T. Li, March 1995
RFC 1519, “Classless Inter-Domain Routing (CIDR): an Address Assignment and
Aggregation Strategy.” V. Fuller, T. Li, J. Yu, K. Varadhan, September 1993
RFC 1997, “BGP Communities Attribute.” R. Chandra, P. Traina, T. Li, August 1996
www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/bgp.htm
www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_c/ipcprt2/
1cdbgp.htm
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