[crossbow-discuss] vnic on top of aggr of 2 x 1 Gbit/s NICs

[Nicolas Droux]

Michel Schuster wrote:
> Hi,
> 
> Can you tell why my vnic built on top of an aggregation of 2 NICs of 1 Gbit/s doesn't report a speed of 2 GBit/s ?

Two things:

1) aggr doesn't report the sum of the link speed of its constituent 
ports, it returns the link speed of its constituent ports.

2) keep in mind that aggr in crossbow-gate was not yet ported to the 
Crossbow virtualized MAC, so it is not yet functional, even though dladm 
*-aggr commands may succeed.

Nicolas.

> 
> [root at nazgul /]# dladm show-dev
> bge0            link: up        speed:  1000Mb  duplex: full
> bge1            link: down      speed:     0Mb  duplex: unknown
> bge2            link: down      speed:     0Mb  duplex: unknown
> bge3            link: down      speed:     0Mb  duplex: unknown
> ---
> Aggregation creation: bge1 & bge2 aggregated, BW = 2 Gbps
> ---
> [root at nazgul /]# dladm create-aggr -d bge1 -d bge2 1
> [root at nazgul /]# dladm show-link
> bge0            type: non-vlan  mtu: 1500       device: bge0
> bge1            type: non-vlan  mtu: 1500       device: bge1
> bge2            type: non-vlan  mtu: 1500       device: bge2
> bge3            type: non-vlan  mtu: 1500       device: bge3
> aggr1           type: non-vlan  mtu: 1500       aggregation: key 1
> ---
> Create Virtual NIC on top of this aggregation
> ---
> [root at nazgul /]# dladm create-vnic -d aggr1 1
> [root at nazgul /]# dladm show-link
> bge0            type: non-vlan  mtu: 1500       device: bge0
> bge1            type: non-vlan  mtu: 1500       device: bge1
> bge2            type: non-vlan  mtu: 1500       device: bge2
> bge3            type: non-vlan  mtu: 1500       device: bge3
> aggr1           type: non-vlan  mtu: 1500       aggregation: key 1
> vnic1           type: non-vlan  mtu: 1500       device: vnic1
> ---
> Assign IP address to the vnic
> ---
> [root at nazgul /]# ifconfig vnic1 10.1.28.16 netmask 255.255.255.0
> [root at nazgul /]# ifconfig vnic1 up
> [root at nazgul /]# ifconfig -a
> lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
>         inet 127.0.0.1 netmask ff000000
> bge0: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 2
>         inet 10.1.28.15 netmask ff000000 broadcast 10.255.255.255
>         ether 0:3:ba:50:ab:8d
> vnic1: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 6
>         inet 10.1.28.16 netmask ffffff00 broadcast 10.1.28.255
>         ether 2:8:20:a1:30:74
> [root at nazgul /]# ping 10.1.28.16
> 10.1.28.16 is alive
> ---
> Retrieve speed of vnic1
> ---
> [root at nazgul /]# dladm show-vnic
>         device  speed
> vnic1   aggr1   1000  Mbps      mac: 2:8:20:a1:30:74   (random)
> [root at nazgul /]# dladm show-aggr
> key: 1 (0x0001) policy: L4      address: 0:3:ba:50:ab:8e (auto)
>            device       address                 speed           duplex  link    state
>            bge1         0:3:ba:50:ab:8e   1000Mb        full    up      attached
>            bge2         0:3:ba:50:ab:8f   1000Mb        full    up      attached
> 
> --- Platform details
> [root at nazgul /]# cat /etc/release
>                         Solaris Nevada snv_61-xb_15 SPARC
>            Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
>                         Use is subject to license terms.
>                            Assembled 05 September 2007
> [root at nazgul /]# uname -a
> SunOS nazgul 5.11 snv_61-xb_15 sun4u sparc SUNW,Sun-Fire-V240
>  
>  
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-- 
Nicolas Droux - Solaris Networking - Sun Microsystems, Inc.
nicolas.droux at sun.com - http://blogs.sun.com/droux