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Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide
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Chapter1 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 h ardware, 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 inclu de:
•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 ac tive and standby routers.
•Diagnostic functions—To monitor the “health” of the standby MW R 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 ne twork
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.