Re: [IPCop-user] change red interface mtu

[G.W. H. <ge...@ju...>]

Hi there,

On Wed, 28 Jan 2009 high in the mountains wrote:

> i need to change the mtu for the red interface to 1460. the
> interface just uses a static ip. i have looked at the faq's and
> other posts and i see stuff for vpn and ppp and have changed both of
> those settings to 1460. when i display the interfaces the mtu is
> still at 1500.

Look at the man page for ifconfig:

laptop:~# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:11:5B:94:58:7B
          inet addr:192.168.44.245  Bcast:192.168.44.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4331803 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1775556 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:573946457 (547.3 MiB)  TX bytes:131699125 (125.5 MiB)
          Interrupt:201 Base address:0xd800

laptop:~# ifconfig eth0 mtu 1000
laptop:~# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:11:5B:94:58:7B
          inet addr:192.168.44.245  Bcast:192.168.44.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1000  Metric:1
          RX packets:4331803 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1775557 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:573946457 (547.3 MiB)  TX bytes:131699215 (125.5 MiB)
          Interrupt:201 Base address:0xd800

Be aware that changing the MTU can break things (but not too badly:).

--

73,
Ged.