[c-nsp] Cisco MultiLink PPP

[Lawrence Wong]

Am I correct to say that if using per packet load
sharing, the maximum throughput at any one time will
be the max of the individual link and not the bundle
as a whole?

--- "Richard J. Sears" <rsears at americanIS.net> wrote:

> Hi Rodney,
> 
> Would 7513's running 12.2(27) have problems with
> MLPPP...? We had to
> convert all of our MLPPP customers to ip load
> sharing per packet because
> we would lose the mlppp links and the only way to
> get them back was to
> reboot the router. I would like to use MLPPP, but I
> (like many) have had
> horrible headaches with it.
> 
> We are running around 300 T1s per 7513 with RSP4s.
> 
> Thanks
> 
> On Thu, 24 Mar 2005 09:24:39 -0500
> Rodney Dunn <rodunn at cisco.com> wrote:
> 
> > I've worked through a lot of those bugs on the
> 75xx
> > and we did have some bad ones.
> > 
> > All the ones I know of have been fixed in later
> 12.0S 
> > code and latest 12.2 and 12.3 mainline
> > code.
> > 
> > You were most likely hitting:
> > 
> > CSCed29590
> > Multilink PPP link flap causes output frozen for
> member link
> > 
> > which was the worst one.
> > 
> > I've seen lots of large customers running dMLP on
> > a 75xx running stable for over a year.
> > 
> > My recommendation would be 12.0(27)S4 or 12.3(13).
> > 
> > What I find is most people don't have the box
> setup
> > properly to be running in fully distributed mode
> so the
> > bundles are distributed and/or their VIPs don't
> have the
> > CPU power to handle the bundles.
> > 
> > 
> > Rodney
> > 
> > 
> > CSCeg28064
> > Internally found moderate defect: Assigned (R)
> > cbus complex results in incorrect multilink state
> > 
> > CSCeb31029
> > Internally found moderate defect: Resolved (R)
> > Output rates incorrect on dMLP/dMFR/dLFI
> interfaces under congestion
> > 
> > CSCee69493
> > Externally found moderate defect: Resolved (R)
> > dMLP fails if control is given to IOS MLPPP
> > 
> > CSCin36465 Watchdog crashed because of MLPPP
> > 
> > CSCin47712 txacc loss after OIR
> > 
> > CSCec00268 Input drops and * throttles on PPP
> multilink interface
> > 
> > CSCea59948 Output stuck on a T3 Port Adaptor
> > 
> > CSCec87815
> > Multilink buffer header leak on a VIP with an ATM
> PA installed
> > 
> > CSCed29590
> > Multilink PPP link flap causes output frozen for
> member link
> > 
> > CSCin55432
> > Internally found moderate defect: Resolved (R)
> > Spurious memory access at vipmlp_change_primary
> > 
> > 
> > On Thu, Mar 24, 2005 at 06:01:48AM -0800, David
> Barak wrote:
> > > 
> > > --- Lawrence Wong <lawrencewong72 at yahoo.com>
> wrote:
> > > <questions regarding MLPPP>
> > > 
> > > Cisco MLPPP mostly works, but there are a couple
> of
> > > really bad gotchas.  My experience with it is
> watching
> > > it NOT work on 75xx series routers.  More
> accurately,
> > > it would work, but when a T1 would bounce and
> recover,
> > > a show command would cause the router to reload.
>  That
> > > was not resolved as of last October (when I left
> the
> > > company which had the case open).
> > > 
> > > My overall impression is that MLPPP is
> relatively
> > > flaky.  I could recommend MLFR for
> point-to-point
> > > circuits, but that can be kind of flaky too
> (lots of
> > > problems in initial code releases), although
> I've now
> > > got some customers using this, and it's working
> most
> > > of the time.
> > > 
> > > Do you own both ends of the circuit?
> > > 
> > > -David Barak
> > > need Geek Rock?  Try The Franchise!
> > > http://www.listentothefranchise.com
> > > 
> > > 
> > > 		
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> 
> ******************************************
> Richard J. Sears
> Vice President         
> American Internet Services                          
> ----------------------------------------------------
> rsears at adnc.com
> http://www.adnc.com
> ----------------------------------------------------
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