Cisco InfiniBand 4x User's Guide download pdf (Page 153)

Chapter 7. Configuring the Cisco 3012 InfiniBand to Ethernet gateway 139

Configuring aggregation must be done on both sides of the links (in the Ethernet gateway

module and the 4948). If you only configure one side, it might or might not work, and

unexpected or undesired results will more than likely occur.

Figure 7-14 shows the configuration we will be using to demonstrate aggregation.

Figure 7-14 Network design used to demonstrate link aggregation

7.5.2 Summary of steps to create a bridge group using a trunked connection

Here, we provide a summary of the steps that we describe in the remainder of this section to

implement a bridge group using a trunked connection:

1. Make sure connections between the 3012 and the 4948 are down (step 1 on page 140).

2. Remove any old configurations from the last example (step 2 on page 140).

3. Use Element Manager to open up the Trunking window (step 3 on page 140).

4. Create the trunk group and add desired ports to the trunk (step 4 on page 141).

5. Create the new bridge group and add the new trunk group as the Ethernet connection

(step 5 on page 142).

6. Save the 3012 config to NVRAM (step 6 on page 142).

7. Configure the upstream 4948 to match the Ethernet Gateway configuration (step 7 on

page 143).

ib0

BladeServer10

ib1

Cisco BCH 4X

IB Switch

Cisco 3012

Cisco 4948 Ethernet Switch

Access

VLAN

Int Po5

1/16 1/17

12 port IB – slot 15

12 port IB – slot 16

EGW4

EGW = Ethernet Gateway Module

BG1 = Bridge Group 1

Blue = InfiniBand

Green = Ethernet

Ib0 = 172.16.225.10

Int VLAN 88

172.16.225.250

Eth int 4/1

IB int 4/1

BG1

Eth int 4/2

Aggregation

int po5

Aggregation

int trunk 1

Using default p_key – ff:ff

InfiniBand Network

BladeCenter H

Ethernet Network

Tip: It is always a good idea to shut down the ports or disconnect the cables between the

Ethernet gateway module and the upstream switch while making changes to aggregation.

Failure to do this can result in temporary loops in the network, which can cause a

disruption of the network traffic.

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