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Figure 33: The Origin Attribute
Copyright © 2010, Juniper Networks, Inc.
EGP—Indicates that the route was learned by means of an EGP.
Incomplete—Indicates that the origin of the route is unknown—that is, learned from
something other than IGP or EGP. All routes advertised by the redistribute
command—such as static routes—have an origin of Incomplete. An origin of Incomplete
occurs when a route is redistributed into BGP.
Consider the sample topology shown in Figure 33 on page 115. Because routers Albany
and Boston are not directly connected, they learn the path to each other by means of an
IGP (not illustrated).
The following commands configure router Boston:
host1(config)#ip route 172.31.125.100 255.255.255.252
host1(config)#router bgp 100
host1(config-router)#neighbor 10.2.25.1 remote-as 100
host1(config-router)#neighbor 10.4.4.1 remote-as 100
host1(config-router)#neighbor 10.3.3.1 remote-as 300
host1(config-router)#network 172.19.0.0
host1(config-router)#redistribute static
The following commands configure router NY:
host2(config)#router bgp 100
host2(config-router)#neighbor 10.4.4.1 remote-as 100
host2(config-router)#neighbor 10.2.25.2 remote-as 100
host2(config-router)#network 172.28.8.0 mask 255.255.248.0
The following commands configure router Albany:
host3(config)#router bgp 100
host3(config-router)#neighbor 10.4.4.2 remote-as 100
host3(config-router)#neighbor 10.2.25.2 remote-as 100
host3(config-router)#network 192.168.33.0 mask 255.255.255.0
The following commands configure router LA:
host4(config)#router bgp 300
host4(config-router)#neighbor 10.3.3.2 remote-as 100
Chapter 1: Configuring BGP Routing
115
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Troubleshooting
