To create an etherchannel (“aggregation”) with IEEE 802.1q trunking on Solaris 10

1. Create the Etherchannel and bring it up:
laks:/root # dladm show-dev
nge0            link: up        speed: 100   Mbps       duplex: full
rge0            link: up        speed: 100   Mbps       duplex: full
rtls0           link: unknown   speed: 100   Mbps       duplex: unknown

Create the Etherchannel (aggregation):
laks:/root # dladm create-aggr -d rge0 -d rtls0 1
laks:/root # ifconfig aggr1 plumb

laks:/root # dladm show-aggr
key: 1 (0x0001) policy: L4      address: 0:16:a:1c:4a:6e (auto)
device       address                 speed           duplex  link    state
rge0         0:16:a:1c:4a:6e   100   Mbps    full    up      attached

laks:/root # ifconfig aggr1 192.168.2.31 up

2. Create a IEEE802.1Q Trunk:
Here vlan 21 is used on Etherchannel aggr1:

laks:/root # ifconfig aggr120001 plumb

Assign an IP address:
laks:/root # ifconfig aggr120001 1.2.3.4 netmask 255.0.0.0 up

Now assign an etherchannel to the LACP compatible Cisco Switch:
witch3560(config)#inter fastEthernet 0/6
Switch3560(config-if)#channel-group 3 mode active
Creating a port-channel interface Port-channel 3

See if you get the PO up:
Switch3560(config-if)#no shut
000019: *Mar  1 00:16:19: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/6, changed state to up

On Solaris:
laks:/root # dladm show-dev
nge0            link: up        speed: 100   Mbps       duplex: full
rge0            link: up        speed: 100   Mbps       duplex: full
rtls0           link: unknown   speed: 100   Mbps       duplex: unknown

0. In the Cisco switch, make  a TRUNK:
Switch3560(config-if)#switchport trunk encapsulation dot1q
Switch3560(config-if)#switchport mode trunk
000021: *Mar  1 00:18:14: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
000022: *Mar  1 00:18:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/6, changed state to down

Create VLAN 12:
Switch3560(config) # vlan 12

Now if possible on the Switch – side, assign an IP address in VLAN12:
Switch3560(config-if)#exit
Switch3560(config)#interface vlan 12
Switch3560(config-if)#ip address
000024: *Mar  1 00:19:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/6, changed state to up
Switch3560(config-if)#ip address 1.2.3.5 255.0.0.0
Switch3560(config-if)#no shut

CHECK THAT THE VLAN ADDRESS COMES UP:
Switch3560#sh ip int brief
Interface              IP-Address      OK? Method Status                Protocol
Vlan1                  192.168.2.25    YES NVRAM  up                    up
Vlan12                 1.2.3.5         YES manual up                    up

Ping the IP address in VLAN 12 from the switch.
Switch3560#ping 1.2.3.5

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.5, timeout is 2 seconds:

Check the trunk on the switch:
Switch3560#sh int trunk

Port        Mode             Encapsulation  Status        Native vlan
Fa0/6       on               802.1q         trunking      1

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