I have multiple WAN sites with dual P2P T-1 links between them. Right now, we are doing load balancing on them which isn't using bandwidth efficiently due to most of the traffic only going to a handful of destination IP addresses. I would like to use MLPPP to span the links instead, but I didn't know if:
1. That would adversly impact VOIP traffic.
2. If there is any magic to provisioning the lines.
The T-1 circuits are conventionally provisioned data lines from AT&T, and the routers are 2851's with two VWIC-1MFT-T1 cards in them. Any insight or configuration tips would be appriciated. Mike Morgan - Network Engineer.
I have clarification question. Is this circuit MPLS or P2P? The reason I asked is if it is MPLS that would mean that ATT PE would need to also support MLPPP. This might be a bit off topic to your question but I wanted to bring that up.
I would not think that configuring the links for PPP multilink would have any impact on VOIP. The configuration is fairly simple. You configure the multilink interface which is a virtual interface and where the IP address is configured. It would look something like this:
ip address x.x.x.x 255.255.255.252
no cdp enable
ppp multilink group 1
and on the physical interfaces you make sure the encapsulation is ppp, remove the IP address and assign them to the multilink:
Maybe MLPPP isn't your best choice here, alternate solutions are always worth a look.
An example is a new Cisco Express Forwarding feature that balances traffic across multiple links with the twist that it includes source and destination ports in the path selection decision. Its a "12.4" "T" train feature that is easy to implement and works great. Upgrade the IOS and add one command, its that simple.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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