Riverstone Networks WICT1-12 - Manual (Page 644)

30-40 Riverstone Networks RS Switch Router User Guide Release 8.0
Scenarios for Deploying Channelized T1, E1 and T3 WAN Configuration
30.18 SCENARIOS FOR DEPLOYING CHANNELIZED
T1, E1 AND T3
This section describes some scenarios for deploying Channelized T1, E1 and T3. There are nine scenarios, which cover
the deployment for:
• Bridged MSP MTU/MDU aggregation (see Section 30.18.1 )
• Routed inter-office connections through an Internet Service Provider (ISP)
- With only Channelized T1 on the RS 8000 and RS 8600 (see Section 30.18.2 )
- With Channelized T1 and T3 on the RS 8000 and RS 8600 (see Section 30.18.3 )
• Routed Metropolitan Backbone
- With only Channelized T1 on the RS 8000 and RS 8600 (see Section 30.18.4 )
- With Channelized T1 and T3 on the RS 8000 and RS 8600 (see Section 30.18.5 )
• Routed inter-office connections through an Internet Service Provider (ISP) with Channelized E1 (see
Section 30.18.6 )
• Routed Metropolitan Backbone with Channelized E1 (see Section 30.19.2 )
• Transatlantic connection using Channelized T1 and E1 (see Section 30.18.7 )
• Frame Relay over Channelized T1 (see Section 30.18.8 )
30.18.1 Scenario 1: Bridged MSP MTU/MDU Aggregation
In this scenario, a company has several sites that need to be connected. An MSP provides a Channelized T3 connection
on their RS 32000. Each site has several LANs interconnected through an RS 3000, which also provides four T1 lines
to the MSP. These T1 lines are grouped into a Multilink PPP bundle, so up to seven sites can be interconnected using
a single Channelized T3 line. Note that in this scenario, each MTU/MDU has four T1 lines. In practice, an MSP may
start with one T1 and grow as their business grows. There is also a cost consideration in that once the MSP uses a
certain number of T1 lines it may become more economical to use T3 lines.
Note that if you require redundancy, backup T3 lines could be provided on other RS 32000s.
Figure 30-5 shows the network layout for this scenario. The tables following the figure show the commands used to
configure the interfaces for the routers at the MSP, head office (hqsite), and the remote site, rsite2. The interfaces on
the routers at the remaining sites are configured in a similar way to the corresponding interfaces for rsite2, using the
appropriate IP address for each interface. Only the configurations of the Channelized T1 and T3 interfaces are
described.
Hardware Requirements
Router Hardware Requirements
RS 32000 1 CT3 module with 4 T3 ports.
Each RS 3000 1 Multi-Rate WAN module with 2 T1 WICs.