Traffic auto switch over ??

[k_srinadh]

Dear All,

    We have 2 internet links with different service providers.Everything is working fine.Default Static route is pointing to F/W 1 (to flow Traffic thro ISP1)

Now the problem is If ISP1 link went down, Manually we need to remove static route pointing to F/W 1 & add static route pointing to 2nd F/W.(to flow traffic thro 2nd link).

Can i implement configuration in L3 switch in such a way that Auto switch over Happens when ISP1 internet link goes down.(without Administrator )

Pls find the attached Diagram for your reference.

Regards,

Srinadh.

[cadet alain]

Hi,

You can use ip sla with floating static routes: http://www.cisco.com/en/US/docs/ios/12_3/12_3x/12_3xe/feature/guide/dbackupx.html

Regards.

Alain.

[k_srinadh]

Hi all,

   Any more Help pls...??

regards,

Srinadh.

[bmuggall]

Hi,

   Create two default routes with different administrative distance. If one of the link goes down, then other will take over.

Refer to http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094195.shtml

Reg,

Balu

[Dan-Ciprian Cicioiu]

Hi ,

If i understood well , the static routing re-newal is made on the Layer3 switch: you need to change the default route from the FW1 to FW2

You can try adding 4 static routes , and an ip sla configuration to ping the router internet interface:

Let's name the routers R1 is the one connected to FW1 and R2 is connected to FW2

- a /32 static route to the IP of the R1 router internet interface , this shoud be set just to monitor R1 internet interface through FW1

     ip route x.x.x.x 255.255.255.255 FW1

- 2 default routes :

          - first with the default AD (1) and using a ip sla (icmp) to the /32 IP that was statically set  -> next hop FW2

                ip route 0.0.0.0 0.0.0.0 FW1-IP track 1

          - the second with a higher AD (2) -> next hop FW1

                 ip route 0.0.0.0 0.0.0.0 FW2-IP 2

You should add also the ip sla configuration.

Dan

[k_srinadh]

Hi,

  Thanks for your post.

   this is for Internet link is DOWN then automatically Traffic will swicth ovr.

If IPSEC S2S VPN tunnel is DOWN..then.. what would be the configuration...?

Regards,

Srinadh.