Specifications

266 Implementing IBM System Networking 10Gb Ethernet Switches
򐂰 When a trunk is enabled, the trunk Spanning Tree participation setting takes precedence
over any trunk member.
򐂰 802.1X authentication is not supported on ISL ports or on any port that is part of a trunk.
򐂰 You cannot configure a trunk member as a monitor port in a port-mirroring configuration.
򐂰 Trunks cannot be monitored by a monitor port; however, trunk members can
be monitored.
򐂰 All ports in static trunks must have the same link configuration (speed, duplex, and
flow control).
Static trunks configuration
By default, each trunk group is empty and disabled. To define a static trunk group, complete
the following steps:
1. Add physical ports to a trunk group.
Run [no] portchannel <number> port <port alias or number> from the global
configuration mode to add or remove ports to or from a trunk group (Example 6-20).
Example 6-20 Static trunk configuration
ACC-3#conf t
Enter configuration commands, one per line. End with Ctrl/Z.
ACC-3(config)#portchannel 1 port 1:17,2:17
ACC-3(config)#portchannel 2 port 1:18,2:18
ACC-3(config)#^Z
ACC-3#
2. Enable the trunk group.
Run [no] portchannel <number> enable from the global configuration mode to enable or
disable trunk groups (Example 6-21).
Example 6-21 Enable static trunks
ACC-3#conf t
Enter configuration commands, one per line. End with Ctrl/Z.
ACC-3(config)#portchannel 1 enable
ACC-3(config)#portchannel 2 enable
ACC-3(config)#^Z
ACC-3#
You can remove the current trunk group configuration by running no
portchannel <number>.
3. Configure hashing.
Traffic in a trunk group is statistically distributed among member ports by using a hash
process where various address and attribute bits from each transmitted frame are
recombined to specify the particular trunk port the frame uses.
The switch can be configured to use various hashing options. To achieve the most even
traffic distribution, select options that exhibit a wide range of values for your particular
network. Avoid hashing of information that is not present in the expected traffic, or which
does not vary.
Note: Static trunks are configured in the reference architecture on the links between
ACC-3 and AGG-1, and ACC-3 and AGG-2