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MTU problems in EoMpls domain..

  • From: "Tarun Bhalla" <tarun.bhalla@wipro.com>
  • Date: Fri, 21 Mar 2003 10:11:49 -0800
  • Resent-Date: Fri, 21 Mar 2003 01:25:42 -0500
  • To: <mpls-ops@mplsrc.com>
  • X-OriginalArrivalTime: 21 Mar 2003 04:49:11.0877 (UTC) FILETIME=[3753CF50:01C2EF65]

hi all,
 
I am new to this mailing list. so hi to all.. now my problems :(( 
Actually, I am trying to handle the problem of fragmentation in
Ethernet over MPLS network.
 
This is the existing network topology...
 
LAN A -------> MPLS Domain ----------> LAN B
 
To implement EoMPLS, I am capturing the packet in Ingress of the MPLS domain
and trying to send this as a payload over the MPLS domain.. When I
am doing this the problem is that the frames which are 1500 bytes (normal
ethernet frames) can not be sent across this MPLS domain as the payld
of this domain can only be 1496 bytes... (4 bytes label gets added and leave
the matter when multiple labels are added).. So, I am stuck as i am not
able to send 1500 bytes frames..
 
These all things are being carried on test setups. So, I can not
have the liberty or leisure to use SONET interfaces as my core n/w
interfaces.. also am not sure what to do in order to make use of jumbo
ethernet frames... So, the only option left is to fragment the frames when i
capture the ethernet frames.. but for that i need ur advice..
 
I mean is there any standard methodology that says how to handle
fragmentation in ethernet layer cos I will have to anyway go to this
final resort.. or is there any other way arnd. ??
 
Thanks & Regards
Tarun B
_________________________________________________
Tarun Bhalla
Wipro Technologies
26 Hosur Main Road,
Bommanahalli,
Bangalore- 560 068. India
Tel +91-80-5732293, Extn 3139 <http://www.wipro.com/>