From: gladston@br.ibm.com
Date: Tue Aug 16 2005 - 17:03:38 GMT-3
Hi Arun,
Sorry, I made a mistake. When using 'dialer idle-threshold.." there is two
channel, not two entries on the routing table.
If I am not mistaken, Multilink PPP load balance using both channels,
while BOD does not get load balancing. The second channel is used only
when the first
is 'full'.
I hope we get more feeback on this.
==================================================================================
Bandwidth on demand (BOD) is a Cisco proprietary implementation that
allows the aggregation
of multiple B channels into a single logical connection. This
implementation is widely used in
Cisco-centric networks
The implementation of Cisco's BOD solution is accomplished through the
dialer load-
threshold command
Multilink PPP is a specification that enables the bandwidth aggregation of
multiple B channels
into one logical pipe. Its mission is comparable to that of Cisco's BOD.
More specifically, the
Multilink PPP feature provides load-balancing functionality over multiple
wide area network
(WAN) links, while providing multivendor interoperability, packet
fragmentation and proper
sequencing, and load calculation on both inbound and outbound traffic
Cisco's implementation of Multilink PPP supports the fragmentation and
packet sequencing
specifications in RFC 1717. Multilink PPP enables packets to be fragmented
and the fragments
to be sent (at the same time) over multiple point-to-point links to the
same remote addres
==================================================================================
This discussion says:
===========================================================
quoted from
http://www.groupstudy.com/archives/ccielab/200406/msg00697.html
int bri0
dialer load-threshold 10
and
int bri0
ppp multilink
ppp multilink load-threshold 10
Both will add a second channel when the load reaches 10/255, however in
the
first case you don't really have a ppp multlink, only two seperate
channels.
=======================================================================
Thanks,
Alaerte
"Arun Arumuganainar" <aarumuga@hotmail.com>
Sent by: nobody@groupstudy.com
13/08/2005 01:49
Please respond to
"Arun Arumuganainar" <aarumuga@hotmail.com>
To
Alaerte Gladston Vidali/Brazil/IBM@IBMBR, <ccielab@groupstudy.com>
cc
Subject
Re: Re: config - ISDN B-Channel 2 links - up ---> Doubt
Hmmm ... I am not an Expert on ISDN . But this is what my understanding
!!!
There are two ways of configuring Bandwidth aggrigation 1) PPP Multilink
and 2) BOD . Functionality wise both are exactly the same .
Two Channels to same destination
1 Route in the routing table .
But the difference between them is that PPP multilink is standard fromat
while BOD is cisco properitary !!!
Note : BOD is used when both the ends are CISCO !!! If you are dialing in
to
non cisco devices PPP multilink is the only option
Thanks and Regards
Arun
----- Original Message -----
From: <gladston@br.ibm.com>
To: <ccielab@groupstudy.com>
Sent: Friday, August 12, 2005 11:46 PM
Subject: Re: Re: config - ISDN B-Channel 2 links - up ---> Doubt
> Arun,
>
> Would you agree with Shanky?
>
> I am not sure if you stating a different point.
>
> Configuring 'dialer load-threshold..' without 'ppp multilink':
> -- two channels to the same destination
> -- two entries on the routing table
>
> On the other hand, configuring 'dialer load-threshold..' with 'ppp
multilink':
>
> -- two channels to the same destination
> -- one entry on the routing table
>
> Could you think about an example when 'dialer load-threshold' without
ppp
multilink would be used?
>
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