Cisco Cisco IOS Software Releases 12.2 MC Notas de publicación

For detailed descriptions of each of these features, see the MGX-RPM-1FE-CP Back Card Installation 
and Configuration Note.

Fast Ethernet—Single 10/100 FE port that can be used with or without cRTP/cUDP or PPP 
Multiplexing configured.

cUDP/cRTP—Header compression that compresses UDP/RTP headers to 2 to 4 bytes.

PPP Multiplexing—Method, as defined in RFC 3153, of sending multiple PPP encapsulated packets 
in a single PPP frame.

When working with a MGX-RPM-1FE-CP back card, please take note of the following limitations, 
restrictions, and important notes:

FE and multilink interfaces should be shut down before online insertion and removal (OIR) of the 
MGX-RPM-1FE-CP.

The MGX-RPM-1FE-CP is only supported on the Cisco MGX 8850 RPM-PR.

For PPP Multiplexing, MLP must be configured on the MGX-RPM-1FE-CP back card.

For error messages to be stored, console logging must be configured.

The IP MTU should be set to 512 bytes or less on multilink interfaces.

The MGX-RPM-1FE-CP back card supports up to 8 multilink interfaces.

MLP with LFI is not supported by the Cisco MWR 1900 router. Therefore, MLP with LFI must be 
disabled on peer devices connecting to the Cisco MWR 1900 router T1 MLP connections.

To fully disable PPP Multiplexing, issue the no ppp mux command on the T1 interfaces of the 
routers at both ends of the T1 link. If PPP Multiplexing remains configured on one side of the link, 
that side will offer to receive PPP multiplexed packets.

The following sections list and describe the open and closed caveats for the Cisco MGX-RPM-1FE-CP 
with Cisco IOS Release 12.2(8)MC1.