We see that k8s weave-net tries to create veth with mtu = 65535 for some reason, which is allowed in newer mainstream (and vz8) kernel with patch [1], but not allowed in RHEL7. Before this patch in RH7 ether_setup_rh sets it to ETH_DATA_LEN (1500).
We already have similar hunk increasing mtu in br_dev_setup() from [1], so let's also port the hunk from veth_setup(). https://jira.sw.ru/browse/PSBM-130575 (cherry-pick one hunk from commit 91572088e3fd ("net: use core MTU range checking in core net infra")) [1] Signed-off-by: Pavel Tikhomirov <[email protected]> --- drivers/net/veth.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index 4bbe6cc762f9..b42a3f5fe3df 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -411,6 +411,7 @@ static void veth_setup(struct net_device *dev) ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX); dev->extended->needs_free_netdev = true; dev->extended->priv_destructor = veth_dev_free; + dev->extended->max_mtu = ETH_MAX_MTU; dev->hw_features = VETH_FEATURES; dev->hw_enc_features = VETH_FEATURES; -- 2.31.1 _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
