topic MTU size on bridge domains SLX in Data Center (SLX)

MTU size on bridge domains SLX

JustinH — Thu, 21 Jan 2021 02:36:02 GMT

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?

Re: MTU size on bridge domains SLX

joergkost — Thu, 21 Jan 2021 16:26:02 GMT

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

Re: MTU size on bridge domains SLX

JustinH — Thu, 21 Jan 2021 16:42:10 GMT

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

Re: MTU size on bridge domains SLX

joergkost — Sun, 31 Jan 2021 01:37:02 GMT

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?