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Advanced redistribution

 
  • Feb 03, 2021

create specific seed metric and tags EIGRP and OSPF

  • R2
router eigrp 100  
 network 10.1.23.0 0.0.0.255  
 network 10.1.24.0 0.0.0.255  
!  
router ospf 1  
 no auto-cost  
 network 10.1.12.0 0.0.0.255 area 0  
!  
!  
!  
access-list 1 permit 10.4.0.0 0.0.0.255  
access-list 1 permit 10.4.1.0 0.0.0.255  
access-list 2 permit 10.4.2.0 0.0.0.255  
access-list 2 permit 10.4.3.0 0.0.0.255  
access-list 3 permit 10.4.4.0 0.0.0.255  
no cdp log mismatch duplex  
!  
route-map EIGRP-TO-OSPF permit 10
 match ip address 1
 set metric 100
 set tag 10
!
route-map EIGRP-TO-OSPF permit 20
 match ip address 2
 set metric 200
 set tag 20
!
route-map EIGRP-TO-OSPF deny 30
 match ip address 3
!
route-map EIGRP-TO-OSPF permit 40
 set metric 300
 set tag 30
!

redistribute EIGRP to OSPF

  • R2
conf t
router ospf 1
redistribute eigrp 100 subnets route-map EIGRP-TO-OSPF

OSPF routes redistibuted to EIGRP should have metric of

  • R2
conf t
route-map OSPF-TO-EIGRP
set metric 400 20 255 1 1500
set tag 40

 redistribute OSPF to EIGRP

  • R2
conf t
router eigrp 100
redistribute ospf 1 route-map OSPF-TO-EIGRP

block subnets by tag

  • R2
conf t
route-map OSPF-TO-EIGRP deny 5
 match tag 10 20 30
!
route-map EIGRP-TO-OSPF deny 5
 match tag 40

force EIGRP better route

  • R2
conf t
router eigrp 100
 network 10.1.23.0 0.0.0.255
 network 10.1.24.0 0.0.0.255
 redistribute ospf 1 route-map OSPF-TO-EIGRP
 distance eigrp 90 105   <--
!
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