User guide

SS-1200-S, SS-2200-S and SS-4200-S Series Link Aggregating Taps36
© 2012 Datacom Systems Inc
4.1.4.17 SET LINK PROTECT (SE LP)
This command configures the link protect function for the integrated tap.
SET LINK PROTECT (SE LP) tapnum enable int1 int2 recovery where:
tapnum specific tap number (1 or 2)
enable Link Protect ON/OFF
int1 fail polling interval 1-3600 secs
int2 recover polling interval 1-3600 secs
recovery AUTO/MANUAL
NOTE: The status of LINK PROTECT is shown within the SHOW PORT CONFIG (SH PO
CO) display.
Factory default is that link protect enable is ON, int1 and int2 is 10 seconds and recovery is
AUTO. If one side of the network traffic, through the integrated tap, is interrupted ("LINK"
dropped) for longer than 10 seconds, the tap will enter bypass mode and the other side of the
network will also drop "LINK" with the integrated tap. The TAP will continue to auto recover, as
heard when the bypass relays cycle at the polling interval rate, until link is established or the LINK
PROTECT settings are changed to different values.
# SET LINK PROTECT (SE LP) tapnum enable interval recovery
For example, for a SS-1210BT-BT/SFP, the parameters may be entered as shown:
Example:
# SE LP 1 ON 30 30 AUTO
#
This example command sets the TAP 1 ports (ports 1 and 2) to enable link protect ON, the polling
interval is set to 30 seconds and recovery is set to AUTO.
NOTE: Several common conditions could cause the LINK PROTECT function to initiate
bypass mode:
Prior to the installation of the integrated TAP in an active network; with the factory default
LINK PROTECT settings; and when LINK is not established within the 10 second polling
interval — the LINK PROTECT function will initiate bypass mode.
If one side of the network link is interrupted for longer than the current polling interval —
LINK PROTECT function will initiate bypass mode.
When recovery (AUTO/MANUAL) is set to MANUAL, the TAP will remain in bypass mode once
network link is interrupted through the polling interval. LINK is re-established at the Command Line
Interface (CLI) by re-executing the SET LINK PROTECT command. The bypass mode can also
be reset and LINK re-established by power cycling the TAP.