Brocade Fabric OS FCIP Administrator's Guide v7.1.0 (53-1002748-01, March 2013)

20 Fabric OS FCIP Administrator’s Guide

53-1002748-01

FCIP Trunking

FIGURE 6 Failover to a higher metric standby circuit

10GbE Lossless Link Loss

Circuit failover is supported between 10GbE circuits on FX8-24 blades when both 10GbE ports are

on the same logical switch and are operating in 10 Gbps mode. Besides configuring secondary

circuits for failover, you can configure a set of IP addresses for circuit failover on crossports.

Crossports are addresses (and routes) that belong to the other 10GbE port’s VE group. In other

words, the crossport for xge0 is xge1 and for xge1, the crossport is xge0. For more information on

crossports and configuring crossports, refer to “Crossports” on page 13.

The benefits and limitations of 10GbE Lossless Link Loss (LLL) failover include the following:

• Provides failover to protect against link or network failure and 10GbE port disable.

• Data will not be lost due to failover.

• Failover supports active-passive and active-active configurations.

• Dual mode is not supported for 10GbE port failover. LLL is supported in 10 Gbps mode only.

• Failover does not protect against failure of an FCIP engine.

• Disabling a VE_Port will not trigger 10GbE lossless failover. In this case, route failover will occur

if there is another route available and may cause loss of frames.

NOTE

All circuits and data must belong to a single VE_Port to benefit from LLL.

There are two types of configuration supported:

• Active-active – Data will be sent on both 10GbE ports to initiate weighted balancing of the

batches across the FCIP trunk’s circuits.

• Active-passive – Data fails over using LLL to a passive circuit (one with a higher metric) if all

active lower metric circuit paths fail.

You must establish a metric for failover circuits. If no metric is provided, circuit data will be sent

through both ports and the load will be balanced. Circuits have a default metric of 0. A metric of 1

is required for a standby (passive) circuit.

7800

Circuit 1 - Metric 0 - Active

Circuit 2 - Metric 1 - Standby