RIP, EIGRP & IGRP Router rip Network A.B.C.D Default information originate Redistribute igrp metric 3 Passive-interface serial 0 Neighbor A.B.C.D Router igrp 100 Network A.B.C.D Redi
Trang 1RIP, EIGRP & IGRP
Router rip
Network A.B.C.D
Default information originate
Redistribute igrp metric 3
Passive-interface serial 0
Neighbor A.B.C.D
Router igrp 100
Network A.B.C.D
Redistribute rip metric 1544 10 255 1 1500
Passive-interface ethernet 0
Neighbor A.B.C.D
io default-network A.B.C.D
Router eigrp 100
Network A.B.C.D
Redistribute rip metric 1544 10 255 1 1500
NO AUTO-SUMMARY
Show ip protocols Show ip eigrp neighbor Show ip eigrp topology Debug ip igrp transaction Debug ip igrp events Debug ip rip events EIGRP Authentication Interface serial 0
ip authentication mode eigro 5 mdd
ip authentication key-chain eigrp 5 MyChain
Ị
key chain MyChain key 1
key-string keynumberl key 2
key-string keynumber2
Additional Commands
In IGRP: variance 2" would consider paths of x2
metric of equal path, so to load share
EIGRP summarization: Done on the interface:
ip summary-address eigrp 100 10.1.0.0 255.255.0.0
On NBMA, turn off split-horizon:
No ip split-horizon eigrp XX
NOT
No ip split-horizon <- does not work for eigrp
Eigrp uses multicast address 224.0.0.10 on broadcast media
On NBMA: ip split-horizon is disabled by default on
ip physical interfaces, but NOT on point-to-point or point-to-multiploint interfaces In those cases, make sure you do a "no ip split-horizon" on those interfaces at the hub only, AND put a distribution list on the spoke router not to listen for
advertisements about the internal networks it covers
See check-list on Redistribution!
Spot The Issue
e The "mtric X" parameter in redistribution is
REQUIRED, otherwise RIP will drop the update
Since it doesn't know how to deal with it
e If the igrp or rip timer values need to be
adjusted, this has to be done on EVERY router
within that domain Use "show ip protocols"
to see the timer values
° In IGRP, must use the "ip default-network
A.B.C.D" to redistribute a default network
into the igrpo domain This is required when
redistributing VLSM into FLSN so that the
FLSM subnets are accessible
e EIGRP automatically summarizes at the
classful boundary Make sure you turn off
auto summary with "no auto-summary"
Notes
The "default information originate" command in rip will inject a 0.0.0.0 route within the rip domain This is especially inportant when redistributing from VLSM to FLSM and needing to reach all networks without configuring a static default route
When a static 0.0.0.0 route is defined on a router, rip will automatically redistribute it into the rip domain
Max hop count of 15 in rip, 100 for igrp IGRP uses hop count for loop avoidance only Uses metrics for route path decision
Default: metric = bandwidth + delay
Mutual redistribution between igrp and eigrp of
the same automonous number is automatic