Specifications

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Cisco MWR 2941 Mobile Wireless Edge Router Software Configuration Guide, Release 12.2(33)MRB
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Chapter 1 Cisco MWR 2941 Router Overview
Features
You can use synchronous Ethernet in conjunction with an external timing technology such as GPS to
synchronize timing across the network. For instructions on how to configure synchronous Ethernet, see
the “Configuring Clocking and Timing” section on page 4-39.
Network Clock Quality Selection using REP
Ethernet Synchronization Message Channel (ESMC) is a method for indicating the quality of a clock
source on a synchronous Ethernet network segment. ESMC is described in the G.8264 (2008) standard
and is similar to the Synchronization Status Message (SSM) message used in SONET and SDH. ESMC
is based on the Organization Specific Slow Protocol defined in the IEEE 802.3 standard.
Release 12.2(33)MRA provides support for ESMC for synchronous Ethernet segments using REP.
Release 12.2(33)MRA does not provide support the G.8264 standard.
ESMC provides the following benefits:
• Quality level (QL) enabled implementation – Ensures the use of the highest available level of clock
quality.
• Helps a node derive timing from most reliable source.
• Prevents timing loops.
For instructions on how to configure network clock quality selection using REP, see the “Configuring
Network Clock Quality Selection Using REP” section on page 4-47.
For more information about REP, see the “Resilient Ethernet Protocol (REP)” section on page 1-5.
Routing Protocols
In addition to static routing, the Cisco MWR 2941 supports the following dynamic routing protocols:
• OSPF—An Interior Gateway Protocol (IGP) designed expressly for IP networks that supports IP
subnetting and tagging of externally derived routing information. OSPF also allows packet
authentication and uses IP multicast when sending and receiving packets.
• IS-IS—An Open System Interconnection (OSI) protocol that specifies how routers communicate
with routers in different domains.
• BGP—An interdomain routing protocol designed to provide loop-free routing between separate
routing domains that contain independent routing policies (autonomous systems).
For instructions on how to configure routing on the Cisco MWR 2941, see the “Configuring Routing
Protocols” section on page 4-59.
Bidirectional Forwarding Detection
Bidirectional Forwarding Detection (BFD) provides a low-overhead, short-duration method of detecting
failures in the forwarding path between two adjacent routers, including the interfaces, data links, and
forwarding planes. BFD is a detection protocol that you enable at the interface and routing protocol
levels. For instructions on how to configure BFD, see the “Configuring BFD” section on page 4-59.