These release notes describe the features and caveats for Cisco IOS Release 11.2(8.0.1)FWA4(1) for the LightStream 1010 Asynchronous Transfer Mode (ATM) switch software. This release includes enhancements for the LightStream 1010 ATM switch.
The following features have been added to the LightStream 1010 ATM switch software:
Support for feature card per-flow queueing (FC-PFQ), a daughtercard on the ATM switch processor (ASP) card. FC-PFQ provides the following new features:
Per-virtual circuit (VC) or per-virtual path (VP) output queueing
Rate Scheduling (RS) and Weighted Round Robin (WRR) output scheduling
Multiple, weighted, dynamic thresholds for selective packet marking and discard
Per-VC or per-VP traffic shaping for constant bit rate (CBR) traffic
Dual leaky bucket policing
Logical multicast support (up to 254 leafs per output port, per point-to-multipoint VC)
Network clocking enhancements for smooth switchover
Per-connection or per-interface nondisruptive snooping
Shaped VP tunnels for CBR traffic
Closed User Groups (CUGs), which allow users to form logical groups within virtual private networks to restrict access.
Access lists on Integrated Local Management Interface (ILMI) registration, which deny incorrect ATM addresses from being registered through ILMI and advertised on a Private Network-Network Interface (PNNI).
ATM soft restart, which allows you to change some interface parameters without shutting down the interface.
ATM accounting enhancements, including the following new features:
Accounting enable and disable on individual interfaces
Shutdown and no shutdown on interfaces on which accounting is enabled
Periodic data collection
Support for permanent virtual circuit (PVC) and permanent virtual path (PVP) connection types (two new Management Information Base [MIB] objects: tx_peak_cells and rx_peak_cells [for PVCs or PVPs only])
Signaling diagnostics feature and MIB
Supplemental AToM MIB
See the "Documentation" section for a list of documents that describe these features.
This section describes caveats from Release 11.2(8)WA3(3) that have been corrected by Release 11.2(8.0.1)FWA4(1) of the LightStream 1010 ATM switch software.
CSCdj02004
Symptom: Under some circumstances, the Ethernet port on the LightStream 1010 ATM switch hangs. When you enter the show interface ethernet 2/0/0 command, the interface is shown up but the output queue is full.
CSCdj48371
Symptom: The ATM accounting periodic collection writes more records than the number of VCs it is monitoring.
CSCdj48158
Symptom: The clear counters command can cause a T1 frame slip on the CES ports.
CSCdj49255
Symptom: For PVPs, virtual path identifier (VPI)=0 is not allowed. This restriction has been relaxed for the hard transit PVPs.
CSCdj51042
Symptom: On 25-Mbps PAMs, the show atm vc command can potentially crash the switch.
CSCdj50993
Symptom: There is amemory leak in Release 11.2.8.
CSCdj63058
Symptom: The Service Specific Connection Oriented Protocol (SSCOP) layer sequence number wraparound condition leads to memory leaks and memory fragmentation problems. The problem occurs when the SSCOP's send sequence number reaches a maximum value of 16777215. You must reset the switch to restore normal functionality.
CSCdi72017
Symptom: The switch does not support restart based on the virtual path identifier/virtual channel identifier (VPI/VCI).
CSCdi74298
Symptom: When a reload is entered, the following message might appear.
%ALIGN-3-SPURIOUS: Spurious memory access made at 0x600D2EBC reading 0x0
This caveat does not affect the operation of the switch.
CSCdi85540
Symptom: Logical multicasting is not supported.
CSCdi93291
Symptom: A DS-3 port adapter module (PAM) alarm indication signal (AIS) is not sent from a shutdown port when reloading the switch software. This might cause one side of a link to appear up and the other side of a link to appear down. It only occurs if one side of the link is shut down during a power-up cycle. If the interface is brought up, both sides of the link resume normal operation.
CSCdj03281
Symptom: If a T1/E1 port is configured as the clock source for the system, and the port receives transitions in link status that affect the clock, other interfaces that derive their clock from that clock source might go down for a moment. This occurs only when transitions are less than one second.
CSCdj03621
Symptom: The receive cell counter on the virtual circuit VPI=0, VCI=32 displays erroneous cell counts.
CSCdj04898
Symptom: The SNMP agent on the switch always returns a "Slot empty" value, even if a Flash memory card is present in the Personal Computer Memory Card International Association (PCMCIA) slot.
CSCdj13326
Symptom: ATM Accounting background notification is not supported.
CSCdj22451
Symptom: The LightStream 1010 ATM switch might log the following message.
This message does not affect the switch operation.
CSCdj41665
Symptom: If you hot swap a T1/E1 PAM with an OC3 PAM, the switch might hang.
CSCdj41709
Symptom: The TTB length bit is not set for G832 framing. The TTB messages, which check for the continued presence of the intended transmitter, must be enabled for G832Adm framing.
This section describes unsupported features and limitations, caveats, and some potentially unexpected behavior by the LightStream 1010 ATM switch for Release 11.2(8.0.1)FWA4(1).
The following caveats have been identified for this release of the LightStream 1010 ATM switch software:
CSCdi55937
Symptom: Remote defect identification (RDI) cells sent by an end point in response to alarm indication signal (AIS) cells generated at an intermediate switch with a fault condition on an interface are not propagated beyond the intermediate switch. The intermediate switch removes the connection leg entries for both interfaces participating in the connection when a fault is discovered on one of the interfaces, even though the other interface might still be up. As a result, the RDI cells are dropped at the intermediate switch.
Workaround: None.
CSCdi72255
Symptom: E3 PAMs are limited to 65535 cells per second per PVC regardless of the framing type. There is no benefit from G832 framing.
Workaround: None.
CSCdi74229
Symptom: When more than 1000 SVCs are active on an interface and the shutdown command is entered, all SVCs on that interface are released and the following message appears:
%SYS-3-CPUHOG
This message indicates that the release process runs for a long time before returning control to the kernel, which can then schedule other tasks. This process does not affect normal operation of the switch.
Workaround: None.
CSCdi75584
Symptom: Under very heavy traffic conditions the switch may experience temporary queue cell failures. This should clear after the traffic congestion clears.
Workaround: None.
CSCdi82954
Symptom: The receiver circuitry on DS3 PAMs can interpret noise as a valid signal. This signal is framed incorrectly and does not contain real data. The DS3 controller interprets the signal as a bad signal instead of no signal, and the red RX light emitting diode (LED) lights up.
Workaround: None.
CSCdi83275
Symptom: When a large number of LANE clients come up and down constantly over extended periods of time, the system can run out of AAL5 buffers and the following message appears:
%AAL5-3-INTERNAL_ERROR: No more big aal5 pkts
In most cases, the system continues to function normally, but occasionally the system denies additional calls from end systems.
Workaround: Toggle the interface to reinitialize all connections and restore normal operation.
CSCdi83567
Symptom: When an AddParty message is sent across an E.164 interface, and the message does not include the CallingPartyAddress information element, the AddParty request is rejected on the first attempt. The second attempt is successful.
Workaround: Include the CallingPartyAddress information element in the AddParty message.
CSCdi92142
Symptom: A LECS, using Cisco IOS Version 11.2(X), expects all LESs to establish an individual control VC to the LECS in order to validate clients.
If different Emulated Local Area Networks (ELANs), using Cisco IOS Version 11.1(X), are configured on multiple subinterfaces of the same physical interface, then all LES(s) multiplex the control messages (which validate the clients) into a single VC.
For example, using the following LES router configuration:
This configuration of an LECS sends the following warning messages to the console stating that an LES of one ELAN is attempting to obtain information about another ELAN.
%LANE-4-LECS_WARNING: interface ATM2/0/0: elan 'sysa_70k_31_a1.4_LAN' LES asking for elan
'sysa_70k_31_a1.1_LAN'
%LANE-4-LECS_WARNING: interface ATM2/0/0: elan 'sysa_70k_31_a1.4_LAN' LES asking for elan
'sysa_70k_31_a1.2_LAN'
%LANE-4-LECS_WARNING: interface ATM2/0/0: elan 'sysa_70k_31_a1.4_LAN' LES asking for elan
'sysa_70k_31_a1.3_LAN'
The clients are still allowed to join the ELAN. Disregard the warning message.
Workaround: None.
CSCdj01016
Symptom: You can create variable bit rate (VBR), available bit rate (ABR), and unspecified bit rate (UBR) VCs across the switch with peak cell rate (PCR) values greater than the interface line rate. However, the actual allocated bandwidth continues to be:
Symptom: When one of the installed power supplies is powered OFF, and you are copying an image to bootflash, a power supply failure message appears.
Workaround: None.
CSCdj03229
Symptom: A DS3 interface connected to a Cisco BPX switch occasionally goes down and back up after you enter the no shutdown command. The interface operates normally after it comes up the second time.
Workaround: None.
CSCdj13565
Symptom: ATM RMON data collection is not supported on subinterfaces or tunnels. The atm rmon collect command is accepted on hardware interfaces only; it is ignored on subinterfaces. SNMP and NVGEN support (via portSelTable) is not possible until the Interfaces MIB (RFC 1573) entries are added for tunnel subinterfaces. ATM RMON counters for a hardware interface do not include any of the traffic through tunnels configured on the interface.
Workaround: None.
CSCdj18430
Symptom: The cell count reported on a snooped interface is twice the actual number of cells transmitted.
Workaround: None.
CSCdj18678
Symptom: SNMP support of the ciscoAtmIfPhysEntryData table and LED information is not available on the 25-MB PAM.
Workaround: None.
CSCdj24272
Symptom: The system restarts when you enter the no shutdown command on an E3 interface and the PAM is not installed.
Workaround: None.
CSCdj25772
Symptom: Cell loss may occur while hot swapping a power supply.
Workaround: None.
CSCdj28496
Symptom: The fail over time for the circuit emulation switch (CES) soft VC on a redundant link might be inconsistent, from less than 1 second up to 15 seconds.
Workaround: None.
CSCdj32484
Symptom: A TFTP download to a LightStream 1010 ATM switch might fail because of an ARP table corruption problem.
Workaround: Enter the ip host-routing command before attempting a TFTP download.
CSCdj42070
Symptom: Spurious memory access messages appear when you enter the debug atm packet command on one of the interfaces of the LightStream 1010 ATM switch.
Workaround: None.
CSCdj42967
Symptom: When memory is almost or completely exhausted and a soft PVC goes down, it may not come back up.
Workaround: None.
CSCdj50627
Symptom: With multiple LES/BUS pairs configured on a LightStream 1010 ATM switch and about 20 LECs configured to join the ELANs, repeated shutdown or no shutdown of the interface for an extended time could produce the following error message:
ATMS2000_add_party_to_output_only_errors
Workaround: None.
CSCdj53797
Symptom: The system sends out excessive ARPs on the Ethernet interface when ip host-routing is enabled.
Workaround: None.
CSCdj54954
Symptom: In an LightStream 1010 ATM switch equipped with a FC-PFQ, the maximum number of cells available for use is 64511. The number of cells in the switch fabric is 65535.
Workaround: None.
CSCdj57479
Symptom: When you configure LES/BUS LANE service on the CPU port, and there is heavy signalling traffic, usually when the switch resets and tries to come back up with a large number of clients for each LES/BUS, the following warning message appears:
CPUHOG - atmsig_output
This has no impact on the system functionality or performance.
Workaround: None.
CSCdj10889
Symptom: The call attempt counters for PortSelectGroups may not count the outgoing calls on its NNI interfaces because of switch crankback attempts. This might result in a discrepancy between the call attempt counters shown on Portselgroup representing the interface on which the call came in and the counters shown on the PortSelgroup representing the interface over which an attempt was made to forward the call. This might be seen especially when a call fails.
Workaround: None.
CSCdj11070
Symptom: If you disable Cisco Discovery Protocol (CDP) on the 2/0/0.x interface and it is configured as a LEC, the information is not saved to NVRAM when you enter the copy running-config startup-config command. CDP is disabled in the running configuration, but it reenabled after a system reload.
Workaround: None.
CSCdj59621
Symptom: The system does not support CUGs on soft PVC connections. For example, if you define a set of access policies and a CUG on an interface with the PVC leg of a soft PVC call, the CUG parameters do not apply to those calls.
Workaround: None.
The maximum number of ELAN LES/BUS pairs that the ASP ATM interface supports is 10.
For documentation of Cisco IOS Release 11.2 LightStream 1010 ATM switch software features, refer to the following publications, available as printed manuals or electronic documents:
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