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indula
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Posts: 3
Joined: Thu Mar 09, 2023 8:57 pm

changing TCP MSS for LDP packets in MPLS router

Thu Mar 09, 2023 9:03 pm

HI all,
we have mpls enable router and we need to change the tcp mss for LDP session as there is a MTU bottleneck in path.
we tried using mangle but did not work
/ip firewall mangle
add action=change-mss chain=forward in-interface=sfp1.2 new-mss=1500 passthrough=no protocol=tcp tcp-flags=syn tcp-mss=1460-65535
add action=change-mss chain=forward new-mss=1500 out-interface=sfp1.2 passthrough=no protocol=tcp tcp-flags=syn tcp-mss=1460-65535
can any one support on how this can be done. seems mangle is not working MPLS packets

Regards,
indula

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