[c-nsp] Cisco MultiLink PPP

[Lawrence Wong]

Woops, looks like I have to give up the trusty old
2514 that has been working fine for the past 9 years.
:(

Any idea how many E1 MLPPP is supported on the 2621? I
don't think I will grow beyond 2 channels but if I
need to replace the 2514, it would be on the safe side
to cater for 3-4 E1 MLPPP just in case (would a 3620
be good enough?) .

I am thinking of using the VWIC-2MFT-G703 module on
the 2621 to connect the individual links instead of
getting external v.35 convertors. Anyone has
experience with it?

TIA!

--- Bruce Robertson <bruce at greatbasin.net> wrote:
> Don't try a 2514; not enough CPU.  It'll work great
> on a 2621.  We've bundled 
> four links on a 2651 with no problems.
> 
> --
> Bruce Robertson, President/CEO                      
>     +1-775-348-7299
> Great Basin Internet Services, Inc.    company-wide
> fax: +1-775-348-9412
> http://www.greatbasin.net                       my
> efax: +1-775-201-1553
> 
> Lawrence Wong wrote:
> > --- "Oliver Boehmer (oboehmer)"
> <oboehmer at cisco.com>
> > wrote:
> > 
> >>It is supported on all low- to mid-end routers up
> to
> >>and including 7500,
> >>check the release notes and/or feature navigator
> for
> >>higher-end as well
> >>as hardware-based platforms
> > 
> > 
> > Do you have any idea how well it will work on
> > "ancient" hardware like the 2514 and 2621? Cos
> > currently the E1 (sorry for the earlier typo of
> T1),
> > which connects my warehouse to my head office is
> > terminated at these two equipment (2514 at warehouse
> &
> > 2621 at head office).
> >  
> > 
> >>>Under MLPPP, will traffic be distributed amongst
> >>
> >>both
> >>
> >>>links (i.e. I can download at max of 4Mbps) or am
> >>
> >>I
> >>
> >>>limited to the max of each link (i.e. I can
> >>
> >>download
> >>
> >>>at max of 2Mbps).
> >>
> >>A single session can use up to 4Mbps. MLPPP will
> >>distribute the packets
> >>over both links making sure to preserve the packet
> >>sequence.
> > 
> > 
> > That's cool. It beats running OSPF over multiple
> > links.
> > 
> > What's the lead time like to detect a link failure
> in
> > a MLPPP bundle?
> > 
> > 
> >>>How processor intensive is MLPPP?
> >>
> >>In halfway recent code it is CEF switched and
> >>2x2Mbps should be a
> >>non-issue.. You can optimize by disabling
> >>fragmentation, but it should
> >>not be needed to do this.
> > 
> > 
> > Do you have any idea how scalable it can get for
> the
> > platform (2514 & 2621) metioned above? How many
> E1's
> > can I MLPPP before perform degrades? 3 x 2Mbps? 4
> x
> > 2Mbps?
> > 
> > Will using Cisco 1845 be a better choice for 3 or
> more
> > 2Mbps MLPPP links? I am running just plain WAN
> > connectivity with no bells and whistles.
> > 
> > 
> >>>Are there any caveats to look out for?
> >>
> >>you want to make sure the delay over both links is
> >>somewhat equal.
> >>Otherwise MLPPP could run out of buffers trying to
> >>reassemble fragments
> >>or preserving the packet order. 
> > 
> > 
> > Thanks,
> > 
> > 
> > 
> > 		
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> 


		
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