Home > Ticket 11 – Redistribution Route-map (a & b)

Ticket 11 – Redistribution Route-map (a & b)

April 26th, 2018 in TSHOOT v2 Go to comments

On R4:
router eigrp 10
  redistribute ospf 1 route-map OSPF->EIGRP
  network 10.1.4.0 0.0.0.255
  network 10.1.10.0 0.0.0.255
  network 10.1.21.128 0.0.0.3
 default-metric 100000 100 100 1 1500
  no auto-summary
!
……
route-map OSPF_to_EIGRP deny 10
 match tag 90
route-map OSPF_to_EIGRP permit 20
  set tag 110

Ans1) R4
Ans2) IPv4 Route Redistribution
Ans3) Under the EIGRP process, delete the ‘redistribute ospf 1 route-map OSPF->EIGRP’ command and enter ‘redistribute ospf 1 route-map OSPF_to_EIGRP’ command.

Explanation for this ticket:

In this topology, we are doing mutual redistribution at multiple points (between OSPF and EIGRP on R4, DSW1 & DSW2), which is a very common cause of network problems, especially routing loops so you should use route-map to prevent redistributed routes from redistributing again into the original domain.

In this ticket, route-map is also used for this purpose. For example, the route-map “EIGRP->OSPF” is used to prevent any routes that have been redistributed into OSPF from redistributed again into EIGRP domain by tagging these routes with tag 90. These routes are prevented from redistributed again by route-map OSPF->EIGRP by denying any routes with tag 90 set.

Comments (1) Comments
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  1. Anonymous
    August 9th, 2019

    Sí, siguen poniendo preguntas, son pocas con respecto al route y switch.

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