netdev - Re: Devices with colon in name (iproute2 bug)

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Message-ID: <1290089381.2781.139.camel@edumazet-laptop>
Date:	Thu, 18 Nov 2010 15:09:41 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	Štefan Sakalík <rabbit6440@...il.com>,
	netdev@...r.kernel.org
Subject: Re: Devices with colon in name (iproute2 bug)

Le jeudi 18 novembre 2010 à 13:25 +0000, Ben Hutchings a écrit :

> Linux originally only supported one address per address-family per
> interface.  Additional addresses had to be assigned to 'alias
> interfaces' which were named <base-interface>:<index>.  For backward
> compatibility, colons in interface names are reserved for this purpose.
> If you can create regular interfaces with colons in their names, this
> seems to be a kernel bug.

Yes

Speaking of kernel bug, many devices dont set operstate, while they
really are UP

-> UNKNOWN

# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:21:70:b0:e4:89 brd ff:ff:ff:ff:ff:ff
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000
    link/ether 00:23:4e:1a:49:2d brd ff:ff:ff:ff:ff:ff
4: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
    link/ether 3e:42:f7:21:de:e2 brd ff:ff:ff:ff:ff:ff
6: vboxnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff
7: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 3
    link/ppp 


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