Interface Configuration
7750 SR Interface Configuration Guide Page 95
different aggregation routers to provide protection against router failure. The MLPPP bundle
operates between the BTS and the aggregation routers. At any one time only one of the two
aggregation routers is actually terminating the MLPPP bundle (whichever aggregation router is
processing the active APS circuit).
This example illustrates the following:
• MC-APS (the APS circuits terminate on different aggregation routers)
• APS protecting MLPPP bundles (bundles are between the BTS and the aggregation
routers but APS operates on the SONET links between the DACS and the aggregation
routers)
• APS on channelized access interfaces (OC-3/OC-12 links)
Figure 16: MC-APS MLPPP on Channelized Access Interfaces Example
OSSG143
GigE
GigE
MLS B
MLS A
GigE
GigE
EV-DO
BTS
DACS
T1 # 2
Aggregation
Router B
Aggregation
Router A
Switch
B
AP
TP
TP
AP
TP
TP
Switch
A
BITS I/F
RAN Data VLAN
Inter-Router VLAN
Hand-off Network VLAN
DHCP Relay
DHCP Relay
T3/OC-3/
OC-12
T3/OC-3/
OC-12
GigE
GigE
GigE
GigE
VRRP
T1 # 1
PRS
OAM PDSN, AAA
Hand-off Network
PDSN, AAA VLAN
OAM VLAN
OSPF
Area
To Next Page
Loading...
