Re: VLAN MTU problem in 4.9 ?

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• In reply to: Stephane Raimbault: "VLAN MTU problem in 4.9 ?"
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To: Stephane Raimbault <segr@hotmail.com>
Date: Sat, 27 Dec 2003 07:54:39 +0300 (MSK)

> Hi,
>
> I have the following setup on a freebsd box acting as a router for multiple
> LAN's.
>
> xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> inet 10.0.0.3 netmask 0xffffffc0 broadcast 10.0.0.63
> inet6 fe80::260:97ff:fe07:5f4b%xl0 prefixlen 64 scopeid 0x1
> ether 00:60:97:07:5f:4b
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
> xl1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> inet 207.176.232.142 netmask 0xffffffe0 broadcast 207.176.232.159
> inet6 fe80::2c0:4fff:fe9e:b9c7%xl1 prefixlen 64 scopeid 0x2
> ether 00:c0:4f:9e:b9:c7
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
> vlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> inet 10.0.1.3 netmask 0xffffffe0 broadcast 10.0.1.31
> inet6 fe80::260:97ff:fe07:5f4b%vlan0 prefixlen 64 scopeid 0x4
> ether 00:c0:4f:9e:b9:c7
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
> vlan: 3 parent interface: xl1
> vlan1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> inet 10.0.11.3 netmask 0xffffffe0 broadcast 10.0.11.31
> inet6 fe80::260:97ff:fe07:5f4b%vlan1 prefixlen 64 scopeid 0x5
> ether 00:c0:4f:9e:b9:c7
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
> vlan: 4 parent interface: xl1
>
>
> The setup is physically connected like this
>
> Switch 1 <---> (xl0) FreeBSD (xl1) <---> Switch 2
>
> My Workstation is connected to Switch 1 on the ip network 10.0.0.0/26
> The Server(s) I'm connecting to are on Switch 2 on the ip network
> 10.0.11.0/27 and/or 10.0.1.0/27
>
> I seem to have some problems connecting to the above mentioned servers on
> vlan0 and vlan1. My SSH session seems to freeze when I type a command that
> will output quite a bit of data (top, etc...) I also seem to have some
> other large data problems between the servers communicating to each other
> over the VLAN's.
>
> I had a working setup, but since I upgraded from 4.9-RC2 on the FreeBSD
> router to 4.9-RELEASE-p1 I've been having the above described problem. I'm
> wondering if I left something out in my KERNEL configuration when I upgraded
> or if I've stumbled onto a bug in 4.9-R ?

ifconfig vlan0 mtu 1496
ifconfig vlan1 mtu 1496

will restore old behavior.
But I do not know when default mtu for vlan
was changed.

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• Previous message: Michael Sierchio: "Re: VLAN MTU problem in 4.9 ?"
• In reply to: Stephane Raimbault: "VLAN MTU problem in 4.9 ?"
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