Cisco Cisco IOS Software Releases 12.2 MC
2
Release Notes for Cisco MGX-RPM-1FE-CP Back Card for Cisco IOS Release 12.2(8)MC1
OL-2920-01
Introduction
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Introduction
The MGX-RPM-1FE-CP (one-port, Fast Ethernet-Co-processor) back card is a Cisco MGX 8850
RPM-PR back card that off-loads the following processes from the Route Processor Module (RPM-PR):
RPM-PR back card that off-loads the following processes from the Route Processor Module (RPM-PR):
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Compression/decompression of Real-time Transport Protocol (RTP)/User Datagram Protocol
(UDP) headers (cRTP/cUDP)
(UDP) headers (cRTP/cUDP)
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Multiplexing/demultiplexing of Point-to-Point Protocol (PPP) frames
The MGX-RPM-1FE-CP back card is designed to be used with an MGX 8850 that is equipped with one
or more RPM-PRs and that terminates some number of T1 lines. Each MGX-RPM-1FE-CP back card
has a termination capacity of up to eight T1s (four per MLP bundle). The MGX-RPM-1FE-CP is only
supported with the MLP encapsulation.
or more RPM-PRs and that terminates some number of T1 lines. Each MGX-RPM-1FE-CP back card
has a termination capacity of up to eight T1s (four per MLP bundle). The MGX-RPM-1FE-CP is only
supported with the MLP encapsulation.
The MGX-RPM-1FE-CP back card contains one Fast Ethernet (100Base-Tx) interface. The interface has
an RJ45 connector that is used to connect the card to a Category 5 un-shielded twisted pair (UTP) cable.
Both half- and full-duplex operation are supported.
an RJ45 connector that is used to connect the card to a Category 5 un-shielded twisted pair (UTP) cable.
Both half- and full-duplex operation are supported.
MGX-RPM-1FE-CP Back Card in an IP-RAN of a Mobile Wireless Network
The MGX-RPM-1FE-CP back card off loads the compression/decompression of RTP/UDP headers and
the multiplexing/demultiplexing of PPP frames.
the multiplexing/demultiplexing of PPP frames.
The supported use of the MGX-RPM-1FE-CP back card is within an IP-RAN of a mobile wireless
network. In mobile wireless networks, radio coverage over a geographical space is provided by a network
of radios and supporting electronics (Base Transceiver Station or BTS) distributed over a wide area.
Each radio and supporting electronics represents a “cell.” In traditional networks, the radio signals or
radio data frames collected in each cell are forwarded over a T1 (or similar low-speed, leased) line to a
centralized Base Station Controller (BSC) where they are processed.
network. In mobile wireless networks, radio coverage over a geographical space is provided by a network
of radios and supporting electronics (Base Transceiver Station or BTS) distributed over a wide area.
Each radio and supporting electronics represents a “cell.” In traditional networks, the radio signals or
radio data frames collected in each cell are forwarded over a T1 (or similar low-speed, leased) line to a
centralized Base Station Controller (BSC) where they are processed.
The implementation of the MGX-RPM-1FE-CP backcard in the IP-RAN solution requires the following
components:
components:
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Cisco MGX 8850
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RPM-PR
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MGX-RPM-1FE-CP back card
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FRSM card
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BTS router (Cisco MWR 1900 Mobile Wireless Edge Router)
The solution uses OSPF as the routing protocol and requires MLP for transmission of the packets
between the aggregation node (MGX8850) and the BTS. It requires you to configure the following:
between the aggregation node (MGX8850) and the BTS. It requires you to configure the following:
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The Fast Ethernet (FE) interface to support OSPF. Enable multicast routing and indicate a Protocol
Independent Multicast (PIM) mode.
Independent Multicast (PIM) mode.
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One or more PPP multilink interfaces with PPP mux and RTP header compression attributes.
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A virtual template for each of the multilink groups.
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A PVC under the switch subinterface that references the virtual template.