Cisco ONS 15454 SDH Manual page 23

Chapter 11 Circuits and Tunnels
Figure 11-9
• Multicard EtherSwitch circuits can have virtual SNCP segments if the source or destination is not
in the SNCP domain. This restriction also applies after circuit creation; therefore, if you create a
circuit with SNCP segments, Ethernet drops cannot exist anywhere on the SNCP segment
(Figure
Figure 11-10
Source
Low-order tunnels cannot be the endpoint of an SNCP segment. A SNCP segment endpoint is where
•
the SNCP selector resides.
If you provision full path protection, CTC verifies that the route selection is protected at all segments.
A route can have multiple protection domains with each domain protected by a different scheme.
Table 11-9
combination is invalid and generates an error.
Table 11-9
Connection Type
SNCP
SNCP
SNCP
SNCP
SNCP
SNCP
Double SNCP
Double SNCP
78-18119-01
Ethernet Shared Packet Ring Routing
Ethernet source
Node 1
Node 3
11-10).
Ethernet and SNCP
Node 2 Node 5 Node 6
SNCP Segment
Node 7 Node 8
Legal
through Table 11-12 on page 11-24
Bidirectional VC/TUG/Regular Multicard EtherSwitch/Point-to-Point (Straight)
Ethernet Circuits
Number of
Inbound Links
—
2
2
1
1
—
2
2
Node 2
Node 4
Ethernet destination
Source
Drop
Node 11
summarize the available node connections. Any other
Number of
Outbound Links Number of Sources
2 1
— —
1 —
2 —
— —
1 2
2 —
— —
Cisco ONS 15454 SDH Reference Manual, R8.5
11.14 Manual Circuit Routing
Node 5 Node 6
SNCP Segment
Node 7 Node 8
Illegal
Number of Drops
—
1
—
—
2
—
—
2
Drop
Node 11
11-23