Route Redistribution

1
Route Redistribution
2
Route Redistribution

• Route redistribution is the transfer of routes
  learned from one routing protocol into another
• Used on routers with multiple routing protocols

3
Route Redistribution
IGRP Routing Domain
RIP Routing Domain
Both RIP and IGRP
4
Redistribution Example
Must redistribute routes from RIP into EIGRP and
vice versa on Router A and between IGRP and EIGRP
on Router B.
RIP Domain
200.200.16.32/27
12.1.0.0/16
172.16.16.0/20
Router A
EIGRP Domain
12.2.0.0/16
160.48.32.0/20
129.130.32.0/19
Router B
10.2.0.0/16
10.1.0.0/16
IGRP Domain
5
Redistribute Command
Executed in the router configuration mode for the
routing protocol your redistributing
into. Redistribute ltprotocol redistributing
fromgt ltautonomous systemgt metric
ltvaluegt Autonomous system number is included
only for protocols that use them (i.e. IGRP and
EIGRP). Format of metric depends on the type of
metric used. If no metric is supplied, a default
value is used. The default metric can be changed
with the default metric command.
6
Router A
RIP Domain
200.200.16.32/27
12.1.0.0/16
172.16.16.0/20
Router A
EIGRP Domain
12.2.0.0/16
160.48.32.0/20
129.130.32.0/19
Router B
RouterA(config)router rip RouterA(config-router)
redistribute eigrp 100 metric 1 RouterA(config-rou
ter)exit RouterA(config)router eigrp
100 RouterA(config-router)redistribute rip
metric 2000 200 255 1 1500 Order of metric is
bandwidth, delay, reliability (0-255), load
(0-255), MTU
10.2.0.0/16
10.1.0.0/16
IGRP Domain
7
Router B
RIP Domain
200.200.16.32/27
12.1.0.0/16
172.16.16.0/20
Router A
EIGRP Domain
12.2.0.0/16
160.48.32.0/20
129.130.32.0/19
IGRP Domain
Router B
RouterB(config)router igrp 80 RouterB(config-rout
er)redistribute eigrp 100 metric 200 200 255 1
1500 RouterB(config-router)exit RouterB(config)r
outer eigrp 100 RouterB(config-router)redistribut
e igrp 80 metric 2000 200 255 1 1500 Order of
metric is bandwidth, delay, reliability (0-255),
load (0-255), MTU
10.2.0.0/16
10.1.0.0/16