[c-nsp] Number of MPLS labels and MTU

gladston at br.ibm.com gladston at br.ibm.com
Sat Feb 4 22:16:59 EST 2006


Reading Troubleshooting Virtual Private Networks, by Mark Lewis, he states 
that if using VPN MPLS + TE, a label stack depth of three is used  (RSVP 
signaled TE label + TDP/LDP signaled IGP label + VPN label). 

Considering an application generates a packets with higher number of bytes 
(1472) and DF bit set, the packet will have 1514 bytes without label and
1514 + 4 + 4 +4 bytes travelling through the network. Do you agree?

Would it be enough to configure jumbo frame support and mpls mtu under the 
physical interface or it would be necessary any command under the TE 
tunnel interface?

Alaerte Gladston Vidali
IBM Global Services - SO
Tel.55+11+2121-2879   Fax:55+11+2121-2449

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