[AusNOG] TPG EFM - low MTU

[Nathan Brookfield]

Looks good from my side:

lns01.syd02.nsw#ping 203.219.113.37 source lo100 size 1540 df
Type escape sequence to abort.
Sending 5, 1540-byte ICMP Echos to 203.219.113.37, timeout is 2 seconds:
Packet sent with a source address of 223.25.112.110
Packet sent with the DF bit set
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/11/12 ms
lns01.syd02.nsw#

lns01.syd02.nsw#ping 203.219.113.38 source lo100 size 1540 df
Type escape sequence to abort.
Sending 5, 1540-byte ICMP Echos to 203.219.113.38, timeout is 2 seconds:
Packet sent with a source address of 223.25.112.110
Packet sent with the DF bit set
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/10/12 ms
lns01.syd02.nsw#

Kindest Regards,
Nathan Brookfield (VK2NAB)

Chief Executive Officer
Simtronic Technologies Pty Ltd

Local: (02) 4749 4949 | Fax: (02) 4749 4950 | Direct: (02) 4749 4951
Web: http://www.simtronic.com.au | E-mail: nathan.brookfield at simtronic.com.au

-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Andrew Jones
Sent: Monday, 23 June 2014 3:33 PM
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] TPG EFM - low MTU

To get a PPP session with an MTU of 1500, you'll need to be able to ping those LACs with 1540-byte packets. Can you?


On 23.06.2014 15:20, Bruce Forster wrote:
> Hi Noggers,
>
> I have a strange issue seems to be isolated to VIC LAC's
>
> Some session are coming up at MTU 1476.
>
> I did managed to clear a l2tp tun and the session came back via
> another LAC at 1500.
>
> These are the ones i have had problems with: TPGVICLAC-6e 
> / TPGVICLAC-5e
>
> To get around it iv set mtu on the dialer to match and used a 
> mss-adjust...
>
> I can ping to the LAC's IP at 1500 with no issue.
>
> --
> Regards,
>
> Bruce
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> http://lists.ausnog.net/mailman/listinfo/ausnog

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