Re: VLAN problems

Alexandre Biancalana wrote:
On 1/29/08, Tom Judge <tom@xxxxxxxxxxxx> wrote:
Alexandre Biancalana wrote:
Hi Tom ! Thanks for your help!

I had to step back the chance an put the "old" gateway back, the
performance was unacceptable :-(

Looking closer I see that still have the problem using the old gateway
too, in a small scale because I only use vlan to external links.

This old gateway is running 6.2-STABLE and have 4 network interfaces:
fxp0, fxp1, sk0 and sk1.

fxp0, sk0 and sk1 are no parent of any vlans, are connected to
internal networks and work without problems, follow the ifconfig
ouput:

fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=8<VLAN_MTU>
inet 10.11.0.1 netmask 0xffff0000 broadcast 10.11.255.255
ether 00:02:a5:41:c6:b2
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
sk0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet 10.2.0.36 netmask 0xffff0000 broadcast 10.2.255.255
ether 00:0a:5e:5c:9e:2e
media: Ethernet autoselect (1000baseTX <full-duplex,flag0,flag1>)
status: active
sk1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:0a:5e:5c:27:ef
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active

fxp1 is parent of 7 vlan interfaces: vlan16, vlan20, vlan200, vlan201,
vlan202 and vlan205 that connect my internal network to some external
links, follow the ifconfig output:

vlan200: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 10.200.0.1 netmask 0xfffffffc broadcast 10.200.0.3
ether 00:0c:f1:ac:91:09
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
vlan: 200 parent interface: fxp1
vlan201: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 10.200.0.5 netmask 0xfffffffc broadcast 10.200.0.7
ether 00:0c:f1:ac:91:09
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
vlan: 201 parent interface: fxp1
vlan202: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 10.200.0.9 netmask 0xfffffffc broadcast 10.200.0.11
ether 00:0c:f1:ac:91:09
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
vlan: 202 parent interface: fxp1
vlan205: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
inet 10.0.0.9 netmask 0xfffffffc broadcast 10.0.0.11
ether 00:0c:f1:ac:91:09
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active

Like seen before netstat -niW show output errors in vlan interfaces

# netstat -niW
Name Mtu Network Address Ipkts Ierrs Opkts
Oerrs Coll
vlan201 1500 <Link#11> 00:0c:f1:ac:91:09 53524 0 52234
63 0
vlan202 1500 <Link#12> 00:0c:f1:ac:91:09 5907 0 4421
4 0
vlan205 1500 <Link#15> 00:0c:f1:ac:91:09 9728659 0 9373148
87025 0
(the vlan205 is the most used and the output error is increasing...)

Taking a quick look through if_vlan.c it seems that the output error
counter (ifp->if_oerrors) is only incremented in 3 places:

1) Then padding short frames that are valid with the vlan tag but runts
when they have the tag stripped.

2) When inserting the VLAN tag in to the packet when the underlying
interface does not support vlan hardware tagging.

3) When IFW_HANDOFF fails to hand the packet off to the parent interface.

Do you have any error messages on the console in dmesg? ('cannot pad
short frame', 'unable to prepend vlan header' for example).

no :(

Sorry I'm fresh out of ideas now... Unless you could be should of ram what does netstat -m look like? Also you could look at changing if_vlan.c to print the error number of the error if IFQ_HANDOFF fails.

Tom
_______________________________________________
freebsd-net@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "freebsd-net-unsubscribe@xxxxxxxxxxx"

Relevant Pages