Link Bandwidth Prerequisites and Load Sharing Outbound

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Nov 29th, 2005
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Before I waste time asking a specific question about BGP Link Bandwidth, I wanted to ask a (simple) question: Because Cisco Express Forwarding ( CEF ) needs to be enabled on ALL participating routers according to the documentation, doesn't that imply that they all need to be *Cisco* routers?


I'm going to be connecting with 2 ISPs of unequal bandwidth (20 and 100 mbit). Each use Juniper routers unfortunately.


If I can't use Link Bandwidth what is the best method for me to proportionally balance the OUTBOUND (I don't care that much about inbound balancing) traffic?


Thanks!


Hutch

Correct Answer by Harold Ritter about 11 years 8 months ago

The two ISP routers to which you connect don't matter. They can be Cisco, Juniper or anything else as long as they support BGP.


CEF needs to be enable on the router(s) on which you want to run BGP LB assuming they are Cisco boxes ;o)


Hope this helps,

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Correct Answer
Harold Ritter Tue, 11/29/2005 - 18:39
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  • Cisco Employee,

The two ISP routers to which you connect don't matter. They can be Cisco, Juniper or anything else as long as they support BGP.


CEF needs to be enable on the router(s) on which you want to run BGP LB assuming they are Cisco boxes ;o)


Hope this helps,

mhcraig Wed, 11/30/2005 - 06:30
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It does help - thanks for your input. It just threw me off because the documentation says specifically "Cisco Express Forwarding (CEF) or distributed CEF (dCEF) must be enabled on all participating routers."


I it is suggesting if I were using BGP and load *balancing* between 2 routers on MY side both actively sending outbound traffic I would need to have CEF enabled on each of them. In my situation I just have1 router on my side (well I guess technically I'll have 2 with HSRP but only 1 is active at any given time.)


Now I'll probably post my actual Link Bandwidth questions in another topic....!


Thanks for your input,


Hutch

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