https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194855
Bug ID: 194855
Summary: VLAN interface MTU does not change on changing the
base interface MTU
Product: Base System
Version: 10.0-RELEASE
Hardware: amd64
OS: Any
Status: Needs Triage
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Testmachine details:
OS: FREEBSD 10.0
We are using Emulex skyhawk adapter.
oce0@pci0:4:0:0: class=0x020000 card=0xe80110df chip=0x072010df rev=0x10
hdr=0x00
vendor = 'Emulex Corporation'
device = 'OneConnect NIC (Skyhawk)'
class = network
subclass = ethernet
bar [10] = type Prefetchable Memory, range 64, base 0xfb340000, size
16384, enabled
bar [18] = type Prefetchable Memory, range 64, base 0xfb320000, size
131072, enabled
bar [20] = type Prefetchable Memory, range 64, base 0xfb300000, size
131072, enabled
Steps to recreate problem:
1. Create a VLAN on a jumbo MTU enabled interface.
ifconfig oce0 mtu 9000 up
ifconfig vlan4 create
ifconfig vlan4 vlan 4 vlandev oce0
2. Change the MTU of the base interface to 1500
ifconfig oce0 mtu 1500
ACTUAL RESULTS :
VLAN interface MTU does not change to 1500, still shows 9000.
EXPECTED RESULT:
VLAN interface MTU should change to the base interface MTU value.
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