Add max MTU 1500 over EWAN

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underzone
Posts: 23
Joined: Tue May 26, 2015 9:07 pm

Add max MTU 1500 over EWAN

Post by underzone » Wed Apr 19, 2017 9:04 pm

I use an 8800NL R2 which is connected to a Vigor 130 via the EWAN port.
The Vigor supports baby jumbo frames and has a max MTU of 1520.
I would like to set the MTU of the 8800NL R2 EWAN port to 1500, it can only offer max 1492 at the moment.

Thanks!

underzone
Posts: 23
Joined: Tue May 26, 2015 9:07 pm

Re: Add max MTU 1500 over EWAN

Post by underzone » Mon Apr 24, 2017 5:38 pm

Some info from the logs:

Apr 24 17:28:48 kern crit kernel: eth4 (Int switch port: 4) (Logical Port: 4) Link UP 1000 mbps full duplex
Apr 24 17:28:48 kern warn kernel: netdev path : eth4.2 -> eth4
Apr 24 17:28:48 kern warn kernel: BCMVLAN : eth4 mode was set to RG
Apr 24 17:28:50 kern warn kernel: eth4.1 MAC address set to 60:03:47:35:57:27
Apr 24 17:28:50 kern warn kernel: netdev path : eth4.1
Apr 24 17:28:50 kern warn kernel: BCMVLAN : eth4 mode was set to RG
Apr 24 17:28:50 daemon notice syslog: pppd:cms logging initialized.
Apr 24 17:28:50 daemon notice syslog: pppd 2.4.1 started by admin, uid 0
Apr 24 17:28:50 daemon notice syslog: PPP: Start to connect ...
Apr 24 17:28:50 daemon crit syslog: session disconnect pppoe.oldsession=a0f3e434e871/0157
Apr 24 17:28:54 daemon crit syslog: PPP server detected.
Apr 24 17:28:54 daemon crit syslog: PPP session established.
Apr 24 17:28:54 kern warn kernel: netdev path : ppp0.1 -> eth4.1
Apr 24 17:28:54 daemon notice syslog: pppd:Using interface ppp0.1
Apr 24 17:28:54 daemon notice syslog: pppd:Connect: ppp0.1 <--> eth4.1
Apr 24 17:28:54 daemon notice syslog: pppd:Couldn't increase MTU to 1500.
Apr 24 17:28:54 daemon err syslog: pppd:Couldn't increase MRU to 1500
Apr 24 17:28:54 daemon err syslog: pppd:Couldn't increase MRU to 1500

Apr 24 17:28:54 daemon crit syslog: PPP LCP UP.
Apr 24 17:28:55 daemon notice syslog: pppd:Remote message: CHAP authentication success
Apr 24 17:28:55 daemon notice syslog: pppd:local LL address fe80::a5dc:b91d:01fc:fb81
Apr 24 17:28:55 daemon notice syslog: pppd:remote LL address fe80::a2f3:e4ff:fe66:9630
Apr 24 17:28:55 daemon notice syslog: pppd:local IP address 31.49.175.186
Apr 24 17:28:55 daemon notice syslog: pppd:remote IP address 172.16.17.131
Apr 24 17:28:55 daemon notice syslog: pppd:primary DNS address 81.139.57.100
Apr 24 17:28:55 daemon notice syslog: pppd:secondary DNS address 81.139.56.100
Apr 24 17:28:55 daemon crit syslog: Received valid IP address from server. Connection UP.

anajames
Posts: 29
Joined: Wed Mar 01, 2017 8:02 am

Re: Add max MTU 1500 over EWAN

Post by anajames » Thu Jun 15, 2017 9:18 am

What i have read about this is that, 8800NL R2 doesn't support Baby Jumbo frames when tested in bridge mode.

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