Any comment about this patch ? Forum user have tested it, and it's correctly fixing his mtu problem.
Le vendredi 18 février 2022 à 17:25 +0100, Alexandre Derumier a écrit : > a forum user have reported strange bug with ovs + mtu9000 when > switching between 2 ovs bridge with different mtu. (1500 vs 9000) > https://antiphishing.cetsi.fr/proxy/v3?i=cWdzUmRSM0ZiRHpoUDkxTSw3- > 90dQgKDkqmWWemZ6js&r=WXNQOUY5VXRSNUlTdlVTThI4PzxOoz24vDyX_lRDxWFQYQjk > Hq27xgjw3hQLoamBbuCSKIqia8FUio_zgv2Z4g&f=R0pWUVNEaUFuMTBCTlptbqOdxRIa > EmX54Uku9_K8PFys74qKNMDYadHFvaTbTNhXBQ48X7FG7vbeJb39p0LVEQ&u=https%3A > //forum.proxmox.com/threads/ovs-problem-with-mtu-9000-on-vms- > assigned-to-vmbr0.105172/&k=8YLU > > I have found 2 bugs: > > 1) ovsint port mtu need to be set with ""ovs-vsctl set mtu-request" > > (ip link set mtu 9000 don't seem to do nothing on ovs-int port, maybe > this have change with last ovs version.) > > > fresh start of a vm 100 + firewall on ovs with mtu 9000: > > 153: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 9000 > qdisc pfifo_fast master fwbr100i0 state UNKNOWN group default qlen > 1000 > link/ether 62:42:32:cc:a2:24 brd ff:ff:ff:ff:ff:ff > 154: fwbr100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc > noqueue state UP group default qlen 1000 > link/ether 46:f6:b7:95:23:86 brd ff:ff:ff:ff:ff:ff > 155: fwln100o0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc > noqueue master fwbr100i0 state UNKNOWN group default qlen 1000 > > > 2) when switching between 2 bridges or ovs with differents mtu, mtu > are not updated on existing interfaces (veth,tap, fwbr, fwnl) > > > vm start : vmbr0 mtu=1500 + firewall > ----------------------------- > 200: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 > qdisc pfifo_fast master fwbr100i0 state UNKNOWN group default qlen > 1000 > link/ether 62:42:32:cc:a2:24 brd ff:ff:ff:ff:ff:ff > 206: fwbr100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc > noqueue state UP group default qlen 1000 > link/ether 46:f6:b7:95:23:86 brd ff:ff:ff:ff:ff:ff > 207: fwpr100p0@fwln100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 > qdisc noqueue master vmbr0 state UP group default qlen 1000 > link/ether 0a:2e:f5:f4:22:e3 brd ff:ff:ff:ff:ff:ff > 208: fwln100i0@fwpr100p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 > qdisc noqueue master fwbr100i0 state UP group default qlen 1000 > link/ether 96:0e:94:11:c1:45 brd ff:ff:ff:ff:ff:ff > > > switch to vmbr1 mtu=9000 + firewall > -------------------------------------- > > 200: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 > qdisc pfifo_fast master fwbr100i0 state UNKNOWN group default qlen > 1000 > link/ether 62:42:32:cc:a2:24 brd ff:ff:ff:ff:ff:ff > 209: fwbr100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc > noqueue state UP group default qlen 1000 > link/ether 46:f6:b7:95:23:86 brd ff:ff:ff:ff:ff:ff > 210: fwpr100p0@fwln100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 > qdisc noqueue master vmbr3 state UP group default qlen 1000 > link/ether 0a:2e:f5:f4:22:e3 brd ff:ff:ff:ff:ff:ff > 211: fwln100i0@fwpr100p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 > qdisc noqueue master fwbr100i0 state UP group default qlen 1000 > link/ether 96:0e:94:11:c1:45 brd ff:ff:ff:ff:ff:ff > > > > > Alexandre Derumier (1): > network: tap_plug: fix mtu > > src/PVE/Network.pm | 30 ++++++++++++++++++++---------- > 1 file changed, 20 insertions(+), 10 deletions(-) > _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
