Question

MTU size on bridge domains SLX

  • 20 January 2021
  • 3 replies
  • 99 views

I have a P2P circuit across several SLX 9540’s with the pw-profile of 9190 set in the bridge domain at each end. However, the end user at each side, cannot ping anything above 1500 MTU across this circuit. I have verified that the global mtu 9216 setting is on all routers through the path. However, my /30 links between each router hop is set at an IP MTU default setting of 1500. Will this IP MTU setting on the /30 links across the path cause the customer not to be able to ping anything above 1500 MTU? Does my layer 3 VE’s that have an IP MTU setting of 1500 affect Layer 2 bridge domain circuit even if I defined pw-profile as 9190?


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3 replies

Userlevel 3

If you use LDP, it will take default frame size, that is signaled by LDP. Can you print out some parts of your configuration?

Which part of the config do you wish to look at?

Userlevel 3

show bridge-domain | include MTU

show interface ethernet $x/y | include  MTU

show running-config bridge-domain

show running-config interface e $x/y

Do you know anything about the MTU at the endpoints?