From: Mounir Mohamed (mounir.mohamed@gmail.com)
Date: Sat Aug 11 2007 - 04:52:46 ART
Hi,
both the virtual-template method and the interface multilink method
use MPPP (RFC 1990). The only difference is in what commands you type.
The interface multilink method is a bit more intuitive, using the interface
multilink method on lower-end routers
(e.g. less than 7200/7500's), is sometimes flaky, and changing the config to
virtual templates made it more stable. That might be fixed in newer code,
so finally it's depending on your platform and IOS image running
Best Regards,
Mounir Mohamed
On 8/10/07, Joe <joe.clyde@utah.edu> wrote:
>
> We have several sites that have multiple T1's. Currently we run bgp
> between the customers and ourselves, we bgp peer to the loopbacks, then
> create 3 or 4 static routes over the T1's (depending on the number of
> T1's)
> to the respective loopbacks. When using per-packet load sharing we get a
> pretty even distribution of traffic across all the links.
> With the new 6500 flex wan cards, per-packet load sharing is not
> supported, so we are looking at other options. Between Multilink (MLPPP)
> and
> virtual-templates, which is more preferred? Do they rely on each other? I
> have a simple multilink set-up which is currently working-
>
> interface Multilink1
> ip address 10.1.1.1 255.255.255.252
> no ip directed-broadcast
> load-interval 30
> ppp multilink
> multilink-group 1
>
> interface Serial10/1/0
> no ip address
> no ip directed-broadcast
> encapsulation ppp
> load-interval 30
> tx-queue-limit 26
> ppp multilink
> multilink-group 1
>
> X the serial interface config by 4
>
> Traffic is evenly distributed, so what does a virtual-template buy me?
> What would be a sample config for vanilla T1's (no dial up...like most
> documents on CCO) with a virtual-tmeplate? Also, very important, what if
> these are all video sites? Should I mix in interleaving (LFI)?
> Any thoughts, experience, ideas or other comments would be greatly
> appreciated.
>
> *Our "provider" Hardware would include 7500's, 7200's as well as 6500's
> (flex wan)...FYI in case there are issues and "customer" hardware, really
> anything that would terminate multiple T1's, 3600's, 2800's, et
>
> Thanks
>
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-- Best Reagrds, Mounir Mohamed
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