https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285967
Bug ID: 285967
Summary: [hyper-v] Changing hn MTU causes on freeze on Azure
D4ds_v6 (and other v6) instances
Product: Base System
Version: 14.2-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: evan...@dell.com
Created a FreeBSD 14.2 Azure virtual machine using the D4ds_v6 instance type.
Azure image used was freebsd-14_2 (14_2-release-amd64-gen2-zfs) published by
thefreebsdfoundation.
When I tried to change the MTU, the command froze forever:
root@echenfreebsd:~ # ifconfig hn0 mtu 1520 up
^C^C^C^C^C^C^C
Any further ifconfig calls would also freeze forever when attempting to print
out hn0's information.
This is the output of the channel sysctl after the freeze:
# sysctl dev.hn.1.channel.12.br.tx.state
dev.hn.1.channel.12.br.tx.state: intrcnt:39 rindex:3000 windex:3064 imask:1
psndsz:0 fvalue:1 ravail:64 wavail:520128
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