Cisco 3845 Router, fail over configuration

sathish.ippani · ‎06-30-2014

Hi Everybody,

Newly joined to this community.

I have a cisco 3845 router, two links(one is BGP, other is Eigrp) are terminated on the router.

Currently traffic is using BGP link as primary path and eigrp as secondary path.

Now we want to make Eigrp as primary and BGP as secondary path.

so we are planning below IPsla and track to configure the same.

any suggestions

# ip route 0.0.0.0 0.0.0.0 x.x.x.x 15 track 1
# ip sla 1
# icmp-echo x.x.x.x source-ipaddress y.y.y.y
# timeout 10
# frequency 3
# ip sla schedule 1 life forever start-time now
# track 1 ip sla 1 reachability

sathish.ippani · ‎06-30-2014

Thanks in Advance

!
router eigrp 65535
redistribute static
passive-interface GigabitEthernet0/0
network 172.25.9.0 0.0.0.3
distance eigrp 220 220
no auto-summary
!

router bgp 1
no synchronization
bgp log-neighbor-changes
redistribute connected
redistribute static
neighbor 192.168.1.1 remote-as 65000
neighbor 192.168.1.1 soft-reconfiguration inbound
distance bgp 20 20 20
no auto-summary
!

Joseph W. Doherty · ‎06-30-2014

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Posting

Why are you planning to use IP SLA?

As you have two dynamic routing protocols, it seems you only need to make EIGRP preferred over BGP (AD adjustment?).

sathish.ippani · ‎07-02-2014

Hi, Thanks for quick update.

We have dons the same we way, but still some of routes are going via BGP path.

DUN30085RTR001#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 172.23.9.1 to network 0.0.0.0

     199.220.41.0/30 is subnetted, 1 subnets
B       199.220.41.176 [120/0] via 152.181.185.69, 18:05:20
     1.0.0.0/24 is subnetted, 1 subnets
B       1.4.204.0 [120/0] via 152.181.185.69, 18:05:20
     152.177.0.0/30 is subnetted, 1 subnets
B       152.177.74.24 [120/0] via 152.181.185.69, 18:05:20
     152.181.0.0/30 is subnetted, 1 subnets
C       152.181.185.68 is directly connected, GigabitEthernet0/0.2
     206.113.119.0/26 is subnetted, 2 subnets
B       206.113.119.128 [120/0] via 152.181.185.69, 18:05:20
B       206.113.119.0 [120/0] via 152.181.185.69, 18:05:20
     199.220.194.0/30 is subnetted, 1 subnets
B       199.220.194.232 [120/0] via 152.181.185.69, 18:05:20
     172.17.0.0/30 is subnetted, 1 subnets
B       172.17.29.0 [120/0] via 152.181.185.69, 18:05:20
     172.16.0.0/24 is subnetted, 1 subnets
D EX    172.16.1.0 [100/259072] via 172.23.9.1, 18:03:06, Vlan86
     172.18.0.0/30 is subnetted, 2 subnets
D EX    172.18.30.0 [100/30976] via 172.23.9.1, 18:03:06, Vlan86
D EX    172.18.29.0 [100/30976] via 172.23.9.1, 18:03:06, Vlan86
     172.21.0.0/30 is subnetted, 1 subnets
D       172.21.106.120 [100/54016] via 172.23.9.1, 18:03:07, Vlan86
     172.20.0.0/30 is subnetted, 1 subnets
D       172.20.107.228 [100/220928] via 172.23.9.1, 18:03:07, Vlan86
     172.23.0.0/30 is subnetted, 1 subnets
C       172.23.9.0 is directly connected, Vlan86
     172.22.0.0/30 is subnetted, 2 subnets
D       172.22.0.144 [100/28416] via 172.23.9.1, 18:03:07, Vlan86
D       172.22.157.84 [100/54016] via 172.23.9.1, 18:03:07, Vlan86
     172.32.0.0/24 is subnetted, 1 subnets
B       172.32.7.0 [120/0] via 152.181.185.69, 18:05:20
     10.0.0.0/8 is variably subnetted, 21 subnets, 5 masks
B       10.30.0.0/21 [120/0] via 152.181.185.69, 18:05:20
B       10.31.0.0/16 [120/0] via 152.181.185.69, 18:05:20
B       10.30.13.0/24 [120/0] via 152.181.185.69, 18:05:20
B       10.20.0.0/16 [120/0] via 152.181.185.69, 18:05:20
B       10.21.0.0/16 [120/0] via 152.181.185.69, 18:05:20
C       10.40.0.0/16 is directly connected, GigabitEthernet0/1
S       10.41.0.0/16 [1/0] via 10.40.4.5
B       10.63.0.0/16 [120/0] via 152.181.185.69, 18:05:21
D EX    10.61.1.0/24 [100/2560007936] via 172.23.9.1, 18:03:07, Vlan86
D       10.60.0.0/16 [100/221184] via 172.23.9.1, 18:03:07, Vlan86
B       10.100.0.44/30 [120/0] via 152.181.185.69, 18:05:21
D       10.133.201.0/24 [100/28672] via 172.23.9.1, 18:03:07, Vlan86
D EX    10.100.0.32/30 [100/30976] via 172.23.9.1, 18:03:07, Vlan86
B       10.90.0.0/16 [120/0] via 152.181.185.69, 18:05:21
B       10.172.16.0/24 [120/0] via 152.181.185.69, 18:05:21
D EX    10.4.204.0/24 [100/259072] via 172.23.9.1, 18:03:07, Vlan86
D EX    10.4.205.0/24 [100/259072] via 172.23.9.1, 18:03:07, Vlan86
B       10.3.202.0/24 [120/0] via 152.181.185.69, 18:05:21
D EX    10.4.202.0/24 [100/259072] via 172.23.9.1, 18:03:07, Vlan86
D EX    10.4.201.0/24 [100/259072] via 172.23.9.1, 18:03:07, Vlan86
B       10.254.254.240/32 [120/0] via 152.181.185.69, 18:05:21
     147.225.0.0/30 is subnetted, 1 subnets
B       147.225.40.160 [120/0] via 152.181.185.69, 18:05:21
B    206.169.74.0/24 [120/0] via 152.181.185.69, 18:05:21
D EX 192.168.100.0/24 [100/259072] via 172.23.9.1, 18:03:07, Vlan86
D*EX 0.0.0.0/0 [100/259072] via 172.23.9.1, 18:03:07, Vlan86
DUN30085RTR001#

#sh run | be bgp
router bgp 1
no synchronization
bgp log-neighbor-changes
network 10.40.0.0 mask 255.255.0.0
network 10.100.0.4 mask 255.255.255.252
redistribute connected
redistribute static
neighbor 147.225.50.189 remote-as 65000
neighbor 152.181.185.69 remote-as 65000
neighbor 152.181.185.69 soft-reconfiguration inbound
distance bgp 120 120 120
no auto-summary

1#sh run | be eigrp
router eigrp 65535
redistribute static
passive-interface GigabitEthernet0/0
network 10.40.0.0 0.0.255.255
network 10.100.0.4 0.0.0.3
network 10.100.0.8 0.0.0.3
network 10.100.0.12 0.0.0.3
network 172.20.175.24 0.0.0.3
network 172.23.9.0 0.0.0.3
distance eigrp 100 100
no auto-summary