#18590: MTU issue involving bridge or VLAN ?
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Reporter: ambrosa | Owner: developers
Type: defect | Status: new
Priority: high | Milestone: Chaos Calmer (trunk)
Component: base system | Version: Trunk
Resolution: | Keywords:
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Comment (by ambrosa):
I've made a simple test suggested by Matteo (OpenWRT developer): I've
removed the bridge and worked with eth0.1 and wlin0 and 2 different
subnet.
The problem is solved ! No MTU issue !
So I can suppose that the issue is originated by the bridge code.
{{{
root@OpenWrt:/etc# ifconfig
eth0 Link encap:Ethernet HWaddr E8:DE:xx:xx:xx:14
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:24249 errors:0 dropped:0 overruns:0 frame:0
TX packets:27491 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3727070 (3.5 MiB) TX bytes:15608364 (14.8 MiB)
eth0.1 Link encap:Ethernet HWaddr E8:DE:xx:xx:xx:14
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:496 errors:0 dropped:0 overruns:0 frame:0
TX packets:398 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:66256 (64.7 KiB) TX bytes:46032 (44.9 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:368 errors:0 dropped:0 overruns:0 frame:0
TX packets:368 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:27403 (26.7 KiB) TX bytes:27403 (26.7 KiB)
nas0 Link encap:Ethernet HWaddr E8:DE:xx:xx:xx:15
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23573 errors:0 dropped:0 overruns:0 frame:0
TX packets:20637 errors:91 dropped:0 overruns:91 carrier:0
collisions:0 txqueuelen:1000
RX bytes:15961353 (15.2 MiB) TX bytes:2764679 (2.6 MiB)
pppoe-wan Link encap:Point-to-Point Protocol
inet addr:151.xx.xx.165 P-t-P:151.xx.xx.72
Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:157 errors:0 dropped:0 overruns:0 frame:0
TX packets:223 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:30205 (29.4 KiB) TX bytes:24876 (24.2 KiB)
wlan0 Link encap:Ethernet HWaddr E8:DE:xx:xx:xx:14
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:168 errors:0 dropped:0 overruns:0 frame:0
TX packets:176 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:19103 (18.6 KiB) TX bytes:38086 (37.1 KiB)
========================
root@OpenWrt:/etc# swconfig dev eth0 show
Global attributes:
enable_vlan: 0
Port 0:
uvr: 0
vsr: 0
vinr: 0
tvm: 0
pvid: 1
link: port:0 link:down
Port 1:
uvr: 0
vsr: 0
vinr: 0
tvm: 0
pvid: 1
link: port:1 link:down
Port 2:
uvr: 0
vsr: 0
vinr: 0
tvm: 0
pvid: 1
link: port:2 link:down
Port 3:
uvr: 0
vsr: 0
vinr: 0
tvm: 0
pvid: 1
link: port:3 link:down
Port 4:
uvr: 0
vsr: 0
vinr: 0
tvm: 0
pvid: 1
link: port:4 link:down
Port 5:
uvr: 0
vsr: 0
vinr: 0
tvm: 0
pvid: 1
link: port:5 link:up speed:1000baseT full-duplex auto
Port 6:
uvr: 0
vsr: 0
vinr: 0
tvm: 0
pvid: 1
link: port:6 link:up speed:1000baseT full-duplex auto
VLAN 1:
vid: 1
enable: 1
ports: 0 2 4 5 6t
=====================
}}}
--
Ticket URL: <https://dev.openwrt.org/ticket/18590#comment:3>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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