Please find below diagram. Between R7 and R1 RIPV2 is running, Between R1,R2,R3,R4 EIGRP is running and R3,R4,R5,R6 OSPF is running. I have redistributed RIP into EIGRP and vice versa at R1. At R3 and R4 redistributed EIGRP and OSPF vice versa.
I am getting a loop while trying to ping from R7 to R5'S loopback interface. Reply packet is getting looped at R3. Please find below Show ip route at R3.
3#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
220.127.116.11/24 is subnetted, 1 subnets
D 18.104.22.168 [90/156160] via 22.214.171.124, 00:01:59, FastEthernet1/0
126.96.36.199/24 is subnetted, 1 subnets
C 188.8.131.52 is directly connected, FastEthernet0/0
184.108.40.206/24 is subnetted, 1 subnets
D 220.127.116.11 [90/412160] via 18.104.22.168, 00:01:59, FastEthernet1/0
22.214.171.124/24 is subnetted, 1 subnets
O 126.96.36.199 [110/20] via 188.8.131.52, 00:01:59, FastEthernet0/0
184.108.40.206/24 is subnetted, 1 subnets
C 220.127.116.11 is directly connected, Loopback1
18.104.22.168/24 is subnetted, 1 subnets
D 22.214.171.124 [90/437760] via 126.96.36.199, 00:01:17, FastEthernet1/0
188.8.131.52/24 is subnetted, 1 subnets
O E1 184.108.40.206 [110/45] via 220.127.116.11, 00:02:02, FastEthernet0/0
18.104.22.168/24 is subnetted, 1 subnets
D 22.214.171.124 [90/309760] via 126.96.36.199, 00:01:18, FastEthernet1/0
188.8.131.52/32 is subnetted, 1 subnets
O 184.108.40.206 [110/11] via 220.127.116.11, 00:02:02, FastEthernet0/0
18.104.22.168/32 is subnetted, 1 subnets
O 22.214.171.124 [110/21] via 126.96.36.199, 00:02:02, FastEthernet0/0
188.8.131.52/24 is subnetted, 1 subnets
O E1 184.108.40.206 [110/45] via 220.127.116.11, 00:02:02, FastEthernet0/0
18.104.22.168/24 is subnetted, 1 subnets
D 22.214.171.124 [90/312320] via 126.96.36.199, 00:01:18, FastEthernet1/0
10.0.0.0/24 is subnetted, 1 subnets
D 10.1.1.0 [90/284160] via 188.8.131.52, 00:02:02, FastEthernet1/0
184.108.40.206/24 is subnetted, 1 subnets
C 220.127.116.11 is directly connected, FastEthernet2/0
18.104.22.168/24 is subnetted, 1 subnets
O 22.214.171.124 [110/30] via 126.96.36.199, 00:02:02, FastEthernet0/0
188.8.131.52/24 is subnetted, 1 subnets
C 184.108.40.206 is directly connected, FastEthernet1/0
R3 is getting the 220.127.116.11/24 from OSPF i.e R5, In which R7 packet is getting Looped. Please provide me some solution So that I can get a Loop free path. Is there any mechanism to increase the metric at R4 during redistribution. So that R3 will directly forward the packet to R1.
In a topology like this, you're going to want to tag the routes at the redistribution points. You'll deny that tag from being redistributed back into itself. For example:
route-map OSPF-Rip deny 10
match tag 120
route-map OSPF-Rip permit 20
set tag 110
redistribute ospf 1 metric 15 route-map OSPF-Rip
route-map Rip-OSPF deny 10
match tag 110
route-map Rip-OSPF permit 20
set tag 120
router ospf 1
redistribute rip subnets route-map Rip-OSPF
What the above does (OSPF route-map) is tag the RIP traffic that's being redistributed into OSPF as 120 (the RIP AD just to keep it simple). We know thow the routes got into OSPF and that was redistributing them from RIP, so RIP already knows about them. We don't want to redistribute these new OSPF routes into RIP, so we have to match that tag (120) when redistributing OSPF into RIP which explains the first route map.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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