On 9 December 2010 16:14, Thuo Wilson <lixton@gmail.com> wrote:
On 9 December 2010 16:12, Thuo Wilson <lixton@gmail.com> wrote:
On 8 December 2010 18:24, <tonnie@swiftkenya.com> wrote:
Hi Skunks
I?m trying to configure auto-failover between KDN and Safcom links, with KDN being the primary. My router config is as below
Interfaces
interface GigabitEthernet0/0 description LAN ip address 192.168.7.1 255.255.255.0 duplex auto speed auto ! interface GigabitEthernet0/1 Description KDN Link ip address 172.220.70.34 255.255.255.252 duplex auto speed auto ! interface FastEthernet0/0/0 description Link to Safaricom ip address 172.30.6.182 255.255.255.252 duplex auto speed auto !
BGP Config
router bgp 65200 no synchronization bgp log-neighbor-changes network 132.147.160.0 mask 255.255.255.0 network 172.16.0.0 mask 255.255.255.0 network 192.168.7.0 timers bgp 30 45 neighbor 172.30.6.181 remote-as 37061 neighbor 172.30.6.181 ebgp-multihop 3 neighbor 172.30.6.181 update-source FastEthernet0/0/0 neighbor 172.30.6.181 weight 100 neighbor 172.30.6.181 prefix-list INSECTA-ROUTE out neighbor 172.220.70.33 remote-as 65160 neighbor 172.220.70.33 ebgp-multihop 3 neighbor 172.220.70.33 update-source GigabitEthernet0/1 neighbor 172.220.70.33 weight 1000 neighbor 172.220.70.33 prefix-list INSECTA-ROUTE out no auto-summary !
mix, route-maps, AS-PATH and IP SLA ().
OOPPS - PREPEND AS not AS-PATH !
Further, see a sample to suit your need. If you want to monitor P2P links only using SLA try monitor a providers DNS/KNOWN IP on their network eg, since KDN is primary. Do as follows; (btw depending on IOS the command interpretation varies) *ip sla monitor 10* *type echo protocol ipIcmpEcho 172.220.70.34 source-ipaddr 172.220.70.34 * === icmp echo with src address *timeout 500 * ====== delay b4 timeout * frequency 3 * ===== (if host doesnt respond in 1.5 seconds, jipange na backup) *ip sla monitor schedule 10 start-time now* === self explanatory Then: TELL the router to check this *route 0.0.0.0 0.0.0.0 172.220.70.33 route 0.0.0.0 0.0.0.0 172.30.6.181 100* ==== Note the distance, means if primary has been detected to go down, insert this as primary on routing table. *router bgp XXXX * * neighbor 172.30.6.181 weight 1000 <PREFERED>* * neighbor 172.30.6.181 route-map KDN-PRIMARY out * * * * neighbor 172.220.70.33 weight 100 <BACKUP>* * neighbor 172.220.70.33 route-map SAFCOM-BACKUP out * * * *ip prefix-list KDN seq 5 permit 132.147.160.0/24* *ip prefix-list KDN seq 500 deny 0.0.0.0/0 * * * *ip prefix-list SAFCOM seq 5 permit 132.147.160.0/24* *ip prefix-list SAFCOM seq 500 deny 0.0.0.0/0 * * * *route-map KDN-PRIMARY permit 20 * * match ip address prefix-list SAFCOM* * set as-path prepend xxxx xxxx xxxx (3 or more times)* * * *route-map SAFCOM-BACKUP permit 10 * * match ip address prefix-list KDN * *set as-path prepend xxx (or more but not exceeding the above)* (The above takes care of BGP route only if uplink is responding) E&OE. Wilson.
Wilson.
When I shut down KDN interface, Safcom link picks up traffic, but when I bring up the KDN interface, it doesn?t come as primary until I shut down Safaricom. I have given KDN link the required weight.
Could there be a syntax I have missed out?
Regards Anthony
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