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8-6 Cisco BPX 8600 Series Reference
Signaling Plane
Figure 8-3 UNI Signaling Channels
NNI Signaling Channel
There is also a signaling channel established between each adjacent pair of BPX switches. This NNI
signaling channel shown in Figure 8-4 is configured for either IISP or PNNI protocol. During IISP
configuration, one side of the NNI signaling connection is configured as the user side and a weight
is assigned. In the figure, the direct line between the ATN NICs indicates a logical connection; the
physical connection is configured through BPX switch 1 and BPX switch 2.
ESP
ATM
NIC
WAN Service Node
BXM
BXM
BXM/
BPX 8620
Frame Relay CPE
ATM CPE
ATM CPE
10612
User-to-Network
Interface (UNI)
MGX 8220
AUSM
FRSM
ASC
BNM
Local VPI/VCI
Remote VPI/VCI
(VPI 0, VCI 5)
Remote VPI/VCI
(VPI 0, VCI 5)
Remote
DLCI = 0