[j-nsp] Re: Adjusting MSS size for GRE tunnels in JunOS

Daniel Roesen dr at cluenet.de
Thu Dec 1 07:00:35 EST 2005

On Wed, Nov 30, 2005 at 07:02:04PM -0800, Harry Reynolds wrote:
> AFAIK, not at this time. The TCP MSS is a system-wide parameter, and
> JUNOS software does not support adjustment:
> jnpr at foo> start shell 
> % sysctl -A | grep mss
> net.inet.tcp.mssdflt: 512
> net.inet.tcp.v6mssdflt: 1024
> net.inet.tcp.send_mssdflt: 0

This is RE anyway... The OP was asking to modify TCP MSS on packets
passing through a GRE tunnel in order to prevent fragmentation.

Best regards,

CLUE-RIPE -- Jabber: dr at cluenet.de -- dr at IRCnet -- PGP: 0xA85C8AA0

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