Cisco InfiniBand 4x User's Guide download pdf (Page 157)

Chapter 7. Configuring the Cisco 3012 InfiniBand to Ethernet gateway 143

7. After the 3012 configuration is saved, you need to configure the 4948. In this example, we

use ports gi1/16 and gi1/17 on the 4948 to connect to TG1 on the Ethernet gateway

module.

On the 4948 side, we use static aggregation, because this is the only mode that works

correctly with the Ethernet gateway module.

Contact your network engineer if you are not sure what you need to do for this to work.

After logging into the 4948 with sufficient privileges, execute the commands as shown in

Example 7-10 on the 4948. Items that start with an exclamation mark (!) are for

reference/comments only and will not be executed.

Example 7-10 Configure the 4948 to use aggregation

! Assumes starting from enable mode, enter config mode

conf t

! Change int gi1/16 and 17 to the desired config

int range gi1/16 -17

description Connection to 3012 ESM - 4/1 - 4/2 trunk group TG1

! Force the ports back to access and remove any tagging from last section

switchport mode access

no switchport trunk encapsulation dot1q

no switchport trunk allowed vlan 88

! make sure both ports are set to VLAN 88 and have portfast enabled

switchport access vlan 88

spanning-tree portfast

! Create the new aggragation and make it static (mode on)

channel-group 5 mode on

no shut

! 4948 will create a new interface called int portchannel5 (po5 for short))

! Confoigure po5 to match ports 16 and 17

int po5

switchport access vlan 88

switchport mode access

! Exit config mode

end

! Save config to NVRAM

write

8. After the changes have been made to both the Ethernet gateway module and the 4948,

reattach the cables or re-enable the ports.

9. When the ports are up and ready, the InfiniBand client at 172.16.225.10 should be able to

ping the VLAN 88 default gateway IP address (172.16.225.250) on the 4948. It is possible

to verify the trunk group is working by removing first one, and then the other cable (one at

Tip: While it is possible to directly create the port channel interface with the command

int po5, doing this could confuse the port channel and result in undesired operation.

The best way to create a port channel is to run the channel-group command on the

physical interface as shown in Example 7-10, and let that create the port channel

interface automatically.

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