Cisco Nexus 7000 Series Configuration Manual page 300

Information About Advanced BGP
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m .
Figure 11-1
Figure 11-1
AS20
Z
iBGP networks are fully meshed. Each iBGP peer has a direct connection to all other iBGP peers to
prevent network loops.
You should configure a separate interior gateway protocol in the iBGP network.
Note
This section includes the following topics:
•
•
AS Confederations
A fully meshed iBGP network becomes complex as the number of iBGP peers grows. You can reduce
the iBGP mesh by dividing the autonomous system into multiple subautonomous systems and grouping
them into a single confederation. A confederation is a group of iBGP peers that use the same autonomous
system number to communicate to external networks. Each subautonomous system is fully meshed
within itself and has a few connections to other subautonomous systems in the same confederation.
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
11-4
shows an iBGP network within a larger BGP network.
iBGP Network
AS10
A
eBGP
iBGP
B
AS Confederations, page 11-4
Route Reflector, page 11-5
C
iBGP
iBGP
iBGP
iBGP
D
Chapter 11 Configuring Advanced BGP
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