9-29
Cisco ONS 15600 SDH Reference Manual, Release 9.0
78-18400-01
Chapter 9 Management Network Connectivity
9.6.3 OSI Connectionless Network Service
shows the ISO-DCC NSAP address with the default values delivered with the
ONS 15600 SDH. The System ID is automatically populated with the node MAC address.
Figure 9-20
ISO-DCC NSAP Address
System
System identifier
The ONS 15600 SDH system identifier is set to its IEEE 802.3 MAC
address. Each ONS 15600 SDH supports twelve OSI virtual routers.
Each router NSAP system identifier is the ONS 15600 SDH IEEE
802.3 MAC a
n
, where
n
= 0 to 2. For the primary virtual
router,
n
= 0.
SEL
Selector
The selector field directs the protocol data units (PDUs) to the correct
destination using the CLNP network layer service. Selector values
supported by the ONS 15600 SDH include:
•
00—Network Entity Title (NET). Used to exchange PDUs in the
ES-IS and IS-IS routing exchange protocols. (See the
“9.6.4.1 End System-to-Intermediate System Protocol” section
on page 9-31
“9.6.4.2 Intermediate System-to-Intermediate
•
1D—Selector for Transport Class 4 (and for FTAM and TL1
applications (Telcordia GR-253-CORE standard)
•
AF—Selector for the TARP protocol (Telcordia GR-253-CORE
standard)
•
2F—Selector for the GRE IP-over-CLNS tunnel (ITU/RFC
standard)
•
CC—Selector for the Cisco IP-over-CLNS tunnels (Cisco
specific)
•
E0—Selector for the OSI ping application (Cisco specific)
NSELs are only advertised when the node is configured as an ES.
They are not advertised when a node is configured as an IS. Tunnel
NSELs are not advertised until a tunnel is created.
Table 9-8
NSAP Fields (continued)
Field
Definition
Description
39.840F.80.000000.0000.0000.0000.xxxxxxxxxxxx.00
131598
AFI
IDI
Reserved
Area
System ID
RD
ORG
Authority
and
Format
Identifier
SEL
NSAP
Selector
DFI
DSP
Format
Identifier
Routing
Domain
Initial
Domain
Identifier