Chapter 16: Dynamic Routing Protocols
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Route Redistribution for IPv4 Addresses
Route redistribution is defined as the ability to import and export IP routing information from one routing protocol domain
to another. In addition, Local (C4/c CMTS interface networks) and Static (Net Management) routes may be imported into a
protocol domain. The dynamic routing protocols RIPv2 and OSPF may be run at the same time.
The Route Table Manager (RTM) is responsible for choosing the best group of routes provided by each routing protocol. Its
choice is based on the administrative distance assigned to each protocol group. It should be noted this approach requires
that the administrative distance of each protocol entity, including static and connected routes, must be unique.
This feature supports route redistribution at the following levels:
From static to RIPv2 and OSPF
From connected (local) to RIPv2 and OSPF
From RIP to OSPF
From OSPF to RIPv2
This feature supports different types of distribution lists (filtering):
RIP input (per interface or global)
RIP output (per interface or global)
Route redistribution RIPv2 to OSPF
BGP Route Maps
For BGP, route-maps can be used to control the redistribution of IP routes from BGP into another protocol (match
functionality) or to redistribute routes from another protocol into BGP (set functionality).
Distribute-Lists for Route Redistribution within the Default VRF
Distribute-lists rely on standard ACLs to filter on a destination IP prefix. Because support for the BGP routing protocol
requires more complicated filtering of routes, this type of filtering is beyond the syntactic definition of distribute-lists.
The following is an example of default VRF distribute list commands:
configure router bgp 65500 redistribute connected
configure router bgp 65500 distribute-list 77 out connected