[c-nsp] PPP multilink synchronization

Tue May 9 23:37:00 EDT 2006

My experience,

I'm running MLPPP on serial on different links type.
For a direct layer 2 link MLPPP seems to running properly should any of E1 
having problem.
Both sites declare line protocol down.

    Router-Serial/E1 Converter-Microwave w/ E1s-Serial/E1 Converter-Router

For segmented layer 2 link MLPPP (multihop) using LC/what ever.
MLPPP doesn't work pretty well.
If one of each MUX/Converter having problem at one site, on other site the 
line protocol still Up.
And the MLPPP keeps forward all traffic in balance load to all active 
serial.

    Router-Serial/E1 Converter-MUX-Switching-Switching-MUX-Serial/E1 
Converter-Router

So, yes the transmitting / receiving became not perfectly work.
There should some packets to lost.

Salam,
a. Rahman Isnaini r. Sutan

----- Original Message ----- 
From: "Kanagaraj Krishna" <kanagaraj at aims.com.my>
To: "Shaikh, Nasir" <Nasir.Shaikh at atosorigin.com>; 
<gautam_attravanam at sifycorp.com>
Cc: <cisco-nsp at puck.nether.net>
Sent: Wednesday, May 10, 2006 10:05 AM
Subject: Re: [c-nsp] PPP multilink synchronization

: Hi Nasir,
:              FYI, both are serial links. But why do the remote site sees
: link A as active, when actually its down (as seen from our side)? I 
thought
: in PPP multilink bundle setups, its suppose to automatically divert all
: traffic to the active link in the case of outage on the other link. Are
: there any solutions for this issue? Thanks.
:
: Regards,
: Kana
:
: ----- Original Message -----
: From: "Shaikh, Nasir" <Nasir.Shaikh at atosorigin.com>
: To: "Kanagaraj Krishna" <kanagaraj at aims.com.my>;
: <gautam_attravanam at sifycorp.com>
: Cc: <cisco-nsp at puck.nether.net>
: Sent: Tuesday, May 09, 2006 11:07 PM
: Subject: RE: [c-nsp] PPP multilink synchronization
:
:
:
: That is because the remote side still sees both links A & B as active and
: keeps sending packets over both the members of the multilink bundle. This
: results in some packets going through while some do not.
:
: What kind of links are you using? Serial, F/R, ATM? Do you have FREEK (for
: F/R) or OAM/ILMI (for ATM) configured on the links?
:
: regards
:
: Nasir
:
: -----Original Message-----
: From: cisco-nsp-bounces at puck.nether.net
: [mailto:cisco-nsp-bounces at puck.nether.net]On Behalf Of Kanagaraj Krishna
: Sent: dinsdag 9 mei 2006 16:39
: To: gautam_attravanam at sifycorp.com
: Cc: cisco-nsp at puck.nether.net
: Subject: Re: [c-nsp] PPP multilink synchronization
:
:
: Regarding the keepalives, I'll give it a try. On the other question, when
: link
: A goes down, link B stays up (physical & line protocol). But ping to the
: other
: side would be intermittent. Shutting the interface for link A on the 
remote
: side results in smooth ping results. Any clues?
:
: Any idea which version of IOS is affected by Bug id CSCsd01816?
:
: Thanks
:
: > Hi
: >
: > It is possible you may be running into Bug id CSCsd01816. Alternatively,
: > force a keepalive on the link and see if it solves the issue. When this
: > happens, does the link go down the other side. What does sh ppp 
multilink
: > give you on the remote side ?
: >
: > Regards
: >
: > -----Original Message-----
: > From: cisco-nsp-bounces at puck.nether.net
: > [mailto:cisco-nsp-bounces at puck.nether.net]On Behalf Of Kanagaraj Krishna
: > Sent: Tuesday, May 09, 2006 2:17 PM
: > To: cisco-nsp at puck.nether.net
: > Subject: Re: [c-nsp] PPP multilink synchronization
: >
: >
: > Hi,
: >      I have an issue with my PPP multilink setup which consist of 2 
links
: (A
: > & B). On my side a 7206VXR router is being used, while a 2600 series on
: the
: > remote side. In a situation where link A goes down, the other link B
: should
: > be functioning without issues. But in this case, whenever link A goes
: down,
: > the B link becomes intermittent. Shutting the local interface for link A
: did
: > not have any effect.We solved the issue by shutting the remote interface
: for
: > Link A. Does anyone have any idea on what could be wrong? Could it be
: > related to IOS incompatibility or misconfiguration issues?
: >
: > Thanks,
: > Kanagaraj Krishna
: >
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:
: --
: Kanagaraj Krishna
: Network Engineer
: Network Engineering
: Applied Information Management Services Sdn. Bhd.
: (AIMS Sdn. Bhd.)
: Ground Floor, Menara Aik Hua,
: Changkat Raja Chulan,
: 50200 Kuala Lumpur,Malaysia.
:
: Tel     : +603-20314988 Ext : 395
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: Email   : kanagaraj at aims.com.my
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