Cisco Systems 78-13983-04 manual Software Features, Cisco IOS Software, Network Processor Software

Chapter 1 Overview of the MWR 1900

Software Features

transitions of the router pair leverages HSRP to control the relays on the VWIC-2MFT-T1-DIR (or VWIC-2MFT-E1-DIR) in each router to ensure that the relays on the active router are closed and the relays on the standby router are open to avoid double termination of the T1 (or E1).

Software Features

The software running on the MWR 1900 platform consists of two components: Cisco IOS software running on the MIPs-based route processor portion of the MWR 1900 hardware, and microcode running on the Cisco network processor, also known as “Parallel eXpress Forwarding (PXF).” Because the MWR 1900 is designed specifically for deployment in an IP-RAN at the BTS, it is customized for performance, high availability, quality of service, and link efficiency.

Cisco IOS Software

Cisco IOS software functions added to the MWR 1900 router for the IP-RAN application include:

•Redundancy logic—For monitoring Hot Standby Routing Protocol (HSRP) information to determine the active and standby router and control T1 termination.

•Failover logic—To force a switchover for hardware failures or an over-temperature condition.

•Relay control—To open and close the T1/E1 interfaces on the active and standby routers.

•Diagnostic functions—To monitor the “health” of the standby MWR 1900 router.

Standard Cisco IOS software features supported in the MWR 1900 for the IP-RAN application include:

•IP Fragmentation

•IP Multicast

•IGMP

•MLP, PPP Control Path (IPCP, NCP, LCP, CLNS)

•HSRP

•OSPF

•DHCP

•CDP

•NTP

•SNMP

Network Processor Software

To achieve the required efficiency, the MWR 1900 router has microcode running on the network processor to offload the fast-path processing of packets. This allows the MWR 1900 router to support the traffic of up to 4 T1s or E1s (up to 60,000 packets per second) at a targeted 80% processor utilization while performing UDP/RTP header compression/decompression (cUDP/cRTP) and PPPmux.

Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide

1-2 78-13983-04