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13-10 Cisco BPX 8600 Series Reference
IGX Routing Hubs in a Tiered Network
Figure 13-4 IGX Shelves and Routing Hubs, Frame Relay Connections
Tiered Network Implementation
The following applies to IGX routing hubs and interface shelves:
• An IGX routing hub supports up to 4 IGX interface shelves.
• An IGX interface shelf can have only one feeder trunk to the routing network.
• An IGX interface shelf is the only type of interface shelf that can connect to IGX routing hubs.
• No direct trunking between interface shelves is supported.
• No routing trunk is supported between the routing network and interface shelves.
• The feeder trunks between IGX hubs and IGX interface shelves are connected to a BTM-E1
backcard on each end of the trunk.
• Voice and data connection management to an IGX interface shelf is provided by Cisco
StrataView Plus
• Telnet is supported to an interface shelve; the vt command is not.
ATM
routing
network
IGX
IGX
hub
BTM-E1
2 or 3 segment
Frame relay
connections
IGX IGX
IGX
hub
IGX
IGX
IGX
BPX
SV+
SNMP
--Frame relay
conns on
interface shelves
--ATFR conn for
middle segment
S6415
BTM-E1
The IGX Frame Relay Cards are the
FRM, UFM-U, UFM-C.
The Trunk card on both ends of IGX
feeder trunk is the BTM-E1, T3, or E3.
Legend
Depicts an IGX
interface shelf
IGX
IGX
hub
Depicts an IGX
routing hub
IGX
Depicts an IGX
routing node