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MAGNUM 6K SWITCHES, MNS-6K USER GUIDE
Ports 1 and 7 Configured for sRing Operation
Magnum6K25# show s-ring
Magnum Ring Status:
sRing Status: ENABLED
Port 1 Port 2 Status
1 7 CLOSED
FIGURE 96 – S-Ring configuration commands for root switch
If the BPDU stream is broken, or it finds the Link-Loss-Learn signal, the
system will immediately force STP to put both ports in forwarding mode.
Should that happen, the ring status will be displayed as “OPEN”
If the ring sees BPDUs not belonging to itself on any of the ports, it will set
the ring to “UNKNOWN” state, and stop all ring activity on that ring.
The ring activity has several timers and safeguards to prevent erroneous operation. Ring
faults are not expected to happen in quick successions. If the ring system sees a sequence of
changes in the duration of a less than a second each, it will temporarily ignore the signals and
leave STP to reconfigure the ring (network) using the normal IEEE 802.1d algorithms.
With S-Ring it is also critical to setup and configure Link-Loss-Learn as the S-ring can
recover from fault situations a lot faster. For configuring LLL, use the commands listed
below. LLL has to be setup on other switches in the ring for the in-out ports on the
switch.
Syntax lll <enable|disable> - enable or disable LLL on the switch
If STP is enabled, Link Loss Learn will not work even though it was enabled.
LLL is not enabled on the root node.
Syntax lll add port=<port|list|range> - enable LLL on the list of specified ports
Syntax lll del port=<port|list|range> - disable LLL on the list of specified ports
Syntax show lll – display the status of LLL
Magnum6K25# stp
Magnum6K25(stp)## lll enable
184