Quickly creating VLANs?

Miroslav Slavkov miroslav at svishtov.net
Sun Jun 17 10:23:07 UTC 2007

# ifconfig vlan100 create inet vlan 100 vlandev xl0
# ifconfig vlan100
vlan100: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet netmask 0xffffff00 broadcast
        ether 00:10:5a:48:ce:a4
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        vlan: 100 parent interface: xl0


From: Rudy Rucker [mailto:crapsh at monkeybrains.net]
To: freebsd-net at freebsd.org
Sent: Sun, 17 Jun 2007 02:50:13 +0300
Subject: Re: Quickly creating VLANs?

  Works for me, but if you put in the 'inet' if breaks.
  # ifconfig vlan600 create vlan 600 vlandev fxp1 inet
  ifconfig: inet: bad value
  man ifconfig:
    Since an interface can receive transmissions in differing
    protocols with different naming schemes, specifying the
    address family is recommended.
  either needs to be revised to:
    except when creating a vlan, 'cause that causes sh*t to break
  or, the ifconfig command needs to accept 'inet' when creating a vlan.
  Is inet inherited from the 'vlandev' and therefore redundant?
  Pieter de Boer wrote:
  > Ivan Voras wrote:
  >> ifconfig vlan600 destroy
  >> ifconfig vlan600 create
  >> ifconfig vlan600 vlan 600 vlandev fxp1
  >> ifconfig vlan600 inet netmask
  > Try ifconfig vlan600 create vlan 600 vlandev fxp1
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