HP 6400cl, Management Manual, Page: 251 / 664

Switch Meshing
Switch Meshing Fundamentals
Operating Rules
(See also “Requirements and Restrictions” on page 7-25.)
■ A meshed switch can have some ports in the meshed domain and other
ports outside the meshed domain. That is, ports within the meshed domain
must be configured for meshing, while ports outside the meshed domain
must not be configured for meshing.
■ Meshed links must be point-to-point switch links.
■ On any switch, all meshed ports belong to the same mesh domain.
■ A switch can have up to 24 meshed ports.
■ A mesh domain can include up to 12 switches.
■ On 3400cl and 6400cl switches only , you must disable Stack Management
(stacking) on the switch (
no stack
) before enabling meshing on any switch
port. (In the default configuration, stacking is enabled on the 3400cl and
6400cl switches. Stacking is not available on the 5300xl switches.)
■ Up to five interswitch, meshed hops are allowed in the path connecting
two nodes through a switch mesh domain. A path of six or more meshed
hops between two nodes is unusable. However, in most mesh topologies,
there would normally be a shorter path available, and paths of five hops
or fewer through the same mesh will continue to operate.
■ Hub links between meshed switch links are not allowed.
■ If the switch has multiple static VLANs and you configure a port for
meshing, the port becomes a tagged member of all such VLANs . If you
remove a port from meshing, it becomes an untagged member of only the
default VLAN.
■ A port configured as a member of a static trunk (LACP, FEC, or Trunk)
cannot also be configured for meshing.
■ If a port belongs to a dynamic LACP trunk and you impose meshing on
the port, it automatically ceases to be a member of the dynamic trunk.
■ Meshing is not supported on ports with 802.1X port access security.
■ On a port configured for meshing, if you subsequently remove meshing
from the port’s configuration and reboot the switch, the port returns to its
default configuration. (It
does not revert to any non-default configuration
it had before being configured for meshing).
■ In a given mesh domain, switches in the same product family must run
the same switch software version. For example, if you update the software
version on one Series 5300xl switch, then you must update the software
version on any other Series 5300xl in the mesh. HP recommends that you
always use the most recent software version available for the switches in
your network.
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