B-2

Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
OL-15667-03
Appendix B Configuration Examples
Overview
• A shorthaul interface is used to transfer GSM and UMTS traffic from the Base Transceiver Station

(BTS)/Node-B to the Cisco 3825 router and from the Cisco 3825 router to the Base Station

Controller/Radio Network Controller (BSC/RNC). The traditional shorthaul connections on the

RAN-O devices are connected through the Cisco 2-port T1/E1-RAN interface cards.

• Topology naming conventions such as, 3x2 and 4x3 are used to describe the type of deployment. The

first number signifies the number of GSM/UMTS shorthaul interface connections while the second

number signifies the number of multilink backhaul interface connections. In the case of a combined

GSM/UMTS network, the conventional 3:2x2 can be used where :2 signifies the number of UMTS

shorthaul interface connections.

Asymmetric PWE3 Configuration

The following is an example of an Asymmetric PWE3 configuration (see Figure B-1):

Figure B-1 Asymmetric PWE3 Configuration

PE_1

version 12.4
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
no service password-encryption
!
hostname MWR1
!
boot-start-marker
boot-end-marker
!
card type e1 0 0
card type e1 0 1
card type e1 0 2
card type e1 1 0
card type e1 1 1
logging buffered 2147483
!
no aaa new-model
memory-size iomem 25
!
redundancy
mode y-cable
standalone
!
network-clock-participate slot 1
network-clock-participate wic 0
network-clock-participate wic 1
network-clock-participate wic 2
network-clock-participate aim 1
network-clock-select 1 E1 1/1/1
GE 0/0/0 (Uplink)
GE 0/0/1 (Downlink)
MWR_1
BTS/Node B BSC/RNC
MWR_2
ATM
TDM
ATM
TDM
270636