Datasheet

11-17
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 11 Circuits and Tunnels
11.9 MS-SPRing VC4 Squelch Table
11.9 MS-SPRing VC4 Squelch Table
MS-SPRing VC4 squelch tables show VC4s that will be squelched for every isolated node.
The MS-SPRing Squelch Table window displays the following information:
• VC4 Number—Shows the MS-SPRing VC4 numbers. For two-fiber MS-SPRings, the number of
VC4s is half the MS-SPRing OC-N, for example, an STM-16 MS-SPRing squelch table will show
8 VC4s. For four-fiber MS-SPRings, the number of VC4s in the table is the same as the MS-SPRing
STM-N.
• West Source—If traffic is received by the node on its west span, the MS-SPRing node ID of the
source appears. (To view the MS-SPRing node IDs for all nodes in the ring, click the Ring Map
button.)
• West Dest—If traffic is sent on the node’s west span, the MS-SPRing node ID of the destination
appears.
• East Source—If traffic is received by the node on its east span, the MS-SPRing node ID of the source
appears.
• East Dest—If traffic is sent on the node’s east span, the MS-SPRing node ID of the destination
appears.
Note MS-SPRing squelching is performed on VC4s that carry VC4 circuits only.
11.10 Section and Path Trace
SDH J1 and J2 path trace are repeated, fixed-length strings composed of 64 consecutive bytes. You can
use the strings to monitor interruptions or changes to circuit traffic. The STM64-XFP and MRC-12 cards
support J0 section trace. Table 11-6 shows the ONS 15454 SDH cards that support J1 path trace. Cards
that are not listed in the table do not support the J1 byte.
Table 11-7 shows cards that support J2 path trace.
Table 11-6 ONS 15454 SDH Cards Capable of J1 Path Trace
J1 Function Cards
Transmit and receive E3-12
DS3i-N-12
G-Series
ML-Series
Receive only OC3 IR 4/STM1 SH 1310
OC12/STM4-4
OC48 IR/STM16 SH AS 1310
OC48 LR/STM16 LH AS 1550
OC192 LR/STM64 LH 1550