Dell PowerEdge VRTX - Manual (Page 297)

297
FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGSwitching_STP.fm
D E L L CO N F I D E N T I A L – P R E L I MI N A RY 4/ 1 8 /1 3 - F O R PR O O F O N LY
– STP — Enable/disable STP on the LAG.
– Fast Link — Check to enable Fast Link mode for the LAG. If Fast
Link mode is enabled for a LAG, the LAG State is automatically
placed in Forwarding when the LAG is up. Fast Link mode optimizes
the time it takes for the STP protocol to converge. STP convergence
can take from 30-60 seconds in large networks.
– BPDU Guard — Check to enable BPDU Guard on the LAG.
– Root Guard — Check to prevent devices outside the network core
from being assigned the spanning tree root.
– LAG State — Displays the current STP state of the LAG. If enabled,
the LAG state determines what forwarding action is taken on traffic. If
the bridge discovers a malfunctioning LAG, the LAG is placed in the
Broken state. Possible LAG states are:
•
Disabled — STP is currently disabled on the LAG. The LAG
forwards traffic while learning MAC addresses.
• Blocking — The LAG is blocked and cannot be used to forward
traffic or learn MAC addresses.
• RSTP Discarding State — The LAG does not learn MAC
addresses and does not forward frames. This state is union of
Blocking and Listening state introduced in STP (802.1.D).
• Listening — The LAG is in the listening mode, and cannot
forward traffic or learn MAC addresses.
• Learning — The LAG is in the learning mode, and cannot
forward traffic, but it can learn new MAC addresses.
• Forwarding — The LAG is currently in the forwarding mode, and
it can forward traffic and learn new MAC addresses.
• Broken — The LAG is currently malfunctioning, and cannot be
used for forwarding traffic.
– Role — Displays the LAG role assigned by the STP algorithm that
provides STP paths. The possible options are:
•
Root — This LAG provides the lowest cost path to forward
packets to root switch.