Buy or Renew
Buy or Renew
Cisco + Splunk: It’s a new day for your data. Learn more.
 
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation
654
Views
5
Helpful
2
Replies

MPLS MTU and IP MTU on an interface

pooria_koleyni
Level 1
Level 1

‎12-17-2007 11:33 PM

I am working on a network running MPLS

MPLS MTU 1550 is set under gig interfaces while using show cef interface it shows that IP MTU is 1500

Will this cause some packet drops ?

Isn't it better to have same IP and MPLS MTU or not

thx

Labels:
0 Helpful
2 Replies 2

gauravprakash
Level 1
Level 1

‎12-18-2007 04:45 AM

MPLS mtu means how big a labeled packet can be. so MPLS mtu will be bigger than ip mtu. Each label it has over IP packet wil add 4 bytes.

So its ok to have it, just keep it uniform across the network.

regards,

Gaurav Prakash

0 Helpful

mounir.mohamed
Level 7
Level 7

‎12-18-2007 04:55 AM

It's depending on the MPLS application running on your network as each application (TE, VPN, Qos) add 4 bytes to the header for MPLS aplication labels.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Customers Also Viewed These Support Documents