Cisco ISE - Line Card ISE Manual do Utilizador descarregar pdf (Página 5)

Cisco IOSSoftware Configurationforthe Cisco12000Series One-PortChannelized OC-12/STM-4(DS1/E1)ISE Line

Layer 2 Software Feature Descriptions

Cisco IOS Release 12.0(27)S1

http://www.cisco.com/univercd/cc/td/doc/product/core/cis12000/linecard/lc_chan/13921c12.htm

Layer 2 Software Feature Descriptions

The following subsections provide an overview of the wide area network protocols supported on the

1-Port CHOC-12 ISE line card:

• Cisco High-level Data Link Control Protocol, page 5

• Frame Relay Protocol, page 5

• Multilink Point to Point Protocol, page 5

• Multilink Frame Relay, page 6

Cisco High-level Data Link Control Protocol

The 1-Port CHOC-12 ISE line card supports standard Cisco HDLC encapsulation.

Frame Relay Protocol

The 1-Port CHOC-12 ISE line card supports the following frame relay features:

• ELMI address registration

• Cisco, ANSI and ITU LMI with autosensing

• 2-byte header

• Maximum of 1,024 data link connection identifiers (DLCIs) per interface, channel group or

multilink bundle, with a total limit of 5,120 user defined DLCIs per line card.

Note The current Cisco IOS limitations are 2,048 IDBs per line card. Because each interface requires

at least one hardware IDB and one software IDB, the limit of 1,024 DLCIs applies to each card.

• Link Fragmentation Reassembly (LFI) as specified by the Frame Relay Fragmentation

Implementation Agreement (FRF.12). The available fragmentation sizes are 128, 256, and 512

bytes.

Note Forward explicit congestion notification (FECN) and backward explicit congestion notification

(BECN) signaling are not supported at this release.

Multilink Point to Point Protocol

Compliant with the PPP Multilink Protocol (MP) RFC 1990, The 1-Port CHOC-12 ISE line card

supports the following Multilink Point to Point Protocol(MLPPP) features:

• Up to 8 DS1s per multilink bundle

• Bundle members are limited to a single line card

• Links in the bundle must have equal DS1 bandwidth

• Up to 168 MLPP bundles.

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