https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292759
Aleksandr Fedorov <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |[email protected] --- Comment #5 from Aleksandr Fedorov <[email protected]> --- (In reply to Zhenlei Huang from comment #3) The main problem is that the bridge doesn't set or inherit the VLAN_MTU flag. Therefore, the VLAN driver lowers the MTU because it believes the parent interface can't send packets with an MTU of 1500. Quick and dirty patch, fixes the problem: diff --git a/sys/net/if_bridge.c b/sys/net/if_bridge.c index 9a468a8eb462..fe24991ad84f 100644 --- a/sys/net/if_bridge.c +++ b/sys/net/if_bridge.c @@ -871,7 +871,7 @@ bridge_clone_create(struct if_clone *ifc, char *name, size_t len, ifp->if_softc = sc; if_initname(ifp, bridge_name, ifd->unit); ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; - ifp->if_capabilities = ifp->if_capenable = IFCAP_VLAN_HWTAGGING; + ifp->if_capabilities = ifp->if_capenable = IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU; ifp->if_ioctl = bridge_ioctl; #ifdef ALTQ ifp->if_start = bridge_altq_start; # ifconfig bridge1 create mtu 1500 up # ifconfig bridge1.1 create up # ifconfig bridge1.1 bridge1.1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=0 ether 58:9c:fc:10:05:32 groups: vlan vlan: 1 vlanproto: 802.1q vlanpcp: 0 parent interface: bridge1 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> root@xenon:/home/XeNoN # ifconfig bridge1 bridge1: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500 options=18<VLAN_MTU,VLAN_HWTAGGING> ether 58:9c:fc:10:05:32 id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200 root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0 bridge flags=0<> groups: bridge nd6 options=9<PERFORMNUD,IFDISABLED> -- You are receiving this mail because: You are the assignee for the bug.
