Brocade FastIron Ethernet Switch Stacking Configuration Guide - Manual (Page 41)

device#show stack
alone: standalone, D: dynamic config, S: static config
ID Type Role MAC Address Pri State Comment
1 S FCX624POE active 0000.00e5.0100
128 local Ready
2 S FCX648POE standby 0000.00d6.0511
0 remote Ready
3 S FCX624 member 0000.0099.0000
0 remote Ready
standby active
+---+ +---+ +---+
| 3 |3/1--3/1| 2 |2/1--2/1| 1 |
+---+ +---+ +---+
Current stack management MAC is 0000.00e5.0100
device#
Configuring a default stacking port to function as a data port
You can configure one of the two default stacking ports as a stacking port and the other port as a
regular data port. By default, the 4-byte Ethernet preamble for the Ethernet frame is used when a port is
configured as a default stacking port. This is done to compensate for extra overhead caused by
stacking protocol. To use a default stacking port as a regular data port, the Ethernet preamble must be
set to 8 bytes.
To configure a default port to use the long preamble, enter the long-preamble command at the
Interface level of the CLI.
device(config)#interface ethernet 1/2/1
device(config-if-e10000-1/2/1)#long-preamble
Syntax: [no] long-preamble
Use the no form of the command to revert to the 4-byte Ethernet preamble.
Configuring an ICX 6610 traditional stack
ICX 6610 devices can be stacked using the methods and topologies described in Supported traditional
stacking topologies. This section describes how stacking ports on the ICX 6610 devices can be trunked.
ICX 6610 trunked stacking ports configuration
A trunk doubles the stacking port bandwidth, and provides better resilience. As long as at least one port
of the trunk is connected properly, the communication between the neighboring units will work. Traffic is
load balanced to the trunk ports. With large number of sessions, traffic should be well load balanced
between 40 Gbps and 4 x10 Gbps ports. Traffic should also be well distributed among the four sub-
ports of a 4 x10 Gbps port. If a 4 x10 Gbps sub-port fails due to hardware failure, traffic is re-distributed
to other ports. So, the stack system should still work. Periodical background diagnosis will print out
warning messages that any 4 x10 Gbps sub-port is down.
When a stacking port goes down, it should not cause stack election or topology change as long as the
other port of the same trunk is up. The traffic interruption time should be sub-second for the system to
detect the port down event and reprogram HW.
Stacking ports are trunked by default in ICX 6610 Series. You do not need to configure anything. The
system automatically generate trunk configuration. You must enable stacking and connect cables
properly for the stack to work.
The show trunk command shows user-configured or LACP trunks, and does not show stacking trunks.
Configuring a default stacking port to function as a data port
FastIron Ethernet Switch Stacking Configuration Guide 39
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