Bug 286689 - igb nic flaps when tap added to bridge
Summary: igb nic flaps when tap added to bridge
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 13.5-RELEASE
Hardware: amd64 Any
: --- Affects Many People
Assignee: freebsd-net (Nobody)
URL:
Keywords: IntelNetworking
Depends on:
Blocks:
 
Reported: 2025-05-09 08:57 UTC by Ivan
Modified: 2025-05-09 13:11 UTC (History)
0 users

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Description Ivan 2025-05-09 08:57:14 UTC 
This is similar to what is described in  Bug #249427

But I have all conflicting options turned off:

ifconfig_igb0="inet 192.168.1.1/24 -tso6 -tso4 -txcsum  -txcsum6 -rxcsum -rxcsum6 -lro"


#ifconfig igb0
igb0: flags=8963<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=48520b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,NOMAP>
        ether ec:f4:bb:be:f7:8c
        inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255


And still when you start the first vm, there is an up/down of the interface. This started after upgrading to 13.5, everything worked fine in 13.4