Cisco Systems 8600 Series OAM Cell Support, Diagnostics, Dspalms Dspcon Dspport Tstconseg Tstdly

Functional Description

OAM Cell Support

OAM cells are detected and transmitted by the ASI-1 firmware. System software displays alarm indications detected by the firmware. Additionally, loopbacks between the ATM-UNI and the ATM-CPE can be established. ForeSight round-trip delay cells are generated by firmware upon software request.

System software deals with the following OAM cell flows:

•End-to-End AIS/FERF—software displays on a per-connection basis.

•External segment loopbacks—software initiates loopback of ATM-CPE via user command. The SAR creates the loopback OAM cell. External loopback cells received from the ATM-CPE are processed by the SAR.

•Internal ForeSight round trip delay—software commands the ASI-1 to measure the RTD excluding trunk queueing delay on each ForeSight connection. Software displays the result.

•Internal loopback round trip delay—software commands the ASI-1 to measure the RTD including trunk queueing delay on each ForeSight connection. Software displays the result.

•Internal Remote Endpoint Status—these cells are generated by one end of a connection due to remote network connection failure (A-bit = 0). The other end ASI-1 detects these cells and reports the connection status to software, which displays it.

The following user commands are associated with OAM cell status changes:

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dspalms

dspcon

dspport

tstconseg

tstdly

Diagnostics

Loopbacks

•Local loopbacks loop data back to the local ATM-TE, via the local BPX switch. Remote loopbacks loop data back to the local ATM-TE, via the whole connection route up to and including the remote terminating card.

•Local and remote connection loopbacks, and local port loopbacks, are destructive.

Card Tests

•The generic card selftest mechanism on the BPX switch is modified to include the ASI-1 card.

•The card background test that exists for the FRP card on the IPX switch is modified to work for the ASI-1 card.

Connection Tests

•The tstcon command is not supported. The tstdly command is used for connection continuity testing. ASI-1 tstdly is non-destructive, as compared with the IPX switch tstdly.

12-14Cisco BPX 8600 Series Reference