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Cisco, Cisco Router, Cisco 2650 and 2811, two t1s wondering whats best for optimization

I have to t1s going to another router in our data center. I know I can bond these t1s using PPP multilink, but is this the most optimal solution?

I had also looked at CEF and using ip load-sharing per-packet on each of the interfaces. If i do that will it give the aggregated bandwidth of the two circuits?

What is the most optimal solution? Could someone explain to me how CEF works with the load-sharing per-packet? in comparison to PPP multilink?

Thanks!

ASKER CERTIFIED SOLUTION

Jim_Coyne

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Jim_Coyne

The PPP Multilink Protocol fragments, sequences, and re-orders alternating packets sent across multiple physical connections so that the end result is a single logical link with the combined bandwidth of all of the aggregated physical links.

trivalent

ASKER

thank you!

trivalent

ASKER

One more question... CEF is already enabled on both routers, if I am setting up ppp multi link would i disable cef?

perform a no ip cef?

Jim_Coyne

no need to disable cef, just do the following

int s1/0
encap ppp
ppp multilink group 1
int s1/1
encap ppp
ppp multilink group 1

Add this if you are sending voice across the multilink:
int multilink 1
ppp multilink fragement-delay 10
ppp multilink interleave

add this if you want the interface to show as down in the event a single link fails:
ppp multilink links min 2 mandatory

add this if you want the link to show as down if the quality drops below 50%
ppp quality 50

trivalent

ASKER

thanks!