User`s guide

The Port Trunking Window 3-3
Using ATX Trunking
• helddown — trunking is enabled, but the trunk connection hasbeen rejected.
Indicates that an error has been detected and the link is being held out of
service until the error condition clears. After a short time-out period, another
attempt will be automatically initiated to establish a good trunk connection.
• broken — the port has been configured for trunking, but is physically non-
operational.
Rmt Bridge Id
Displays the MAC address portion of the remote bridge’s bridge ID.
Rmt IP Address
Displays the remote bridge’s IP address.
Last Error
Displays the reason for failure when the link is in a helddown state. Reasons for
failure include:
• (1)none—noerror;thetrunkingprotocolmayrestartwithnoerrorconditions
when trunking is activated for a port or when the MIB variable that controls
extra trunk groups is modified.
• (2) in-bpdu — a spanning tree BPDU was received, indicating that the
connection is not point-to-point, or that the far end of the link does not have
trunking enabled.
• (3) multiple-bridges —a differentbridge has been connectedat thefar end of
the link, and the trunking protocol will restart.
• (4) ack-lost (acknowledgment lost) — the far end of the link has detected a
problem, and the trunking protocol will restart.
• (5) standby — the trunk group is filled to capacity with other ports; this port
isnowa hotstandby. Ifanother port leavesthe trunk group,this port willthen
be included in the group.
• (6)too-many-groups— themaximumnumberofgroups(4)hasbeenreached,
and a new group cannot be added. This port will not be used until the
condition clears.
• (7) no-ack (noacknowledgment) — thisport hasnot receiveda validtrunking
packet, and the trunking protocol will restart.
• (8) perturbed-threshold — errors are preventing stabilization, and the
trunking protocol will restart.
NOTE
The Rmt Bridge Id field can be used to determine which ports belong to which trunk
group. Ports in the same trunk group will have the same remote bridge ID.