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These release notes summarize the functions of the Cisco MGX 8240 Private Line Service Gateway switch software, Release 3.0. These notes describe new features and enhancements as well as a list of known caveats that have been fixed and verified since the previous deployed Release (2.2.0.6). The document also lists open caveats.
These notes are intended for customer functional and operational groups and Cisco System Engineers responsible for installing and provisioning the Cisco MGX 8240 Private Line Service Gateway.
Release 3.0 contains the following new features:
Release 3.0 does not support in-band management.
The present release of 3.0 switch software is installed on cards in the factory, along with the CPE/PSM hardware. Upgrades from previous versions of software are not supported.
Release 3.0 PSM software requires Release 3.0 IMC software and Release 3.0 VCLI software.
The following bugs that existed in Release 2.2.0.6 have been fixed and verified in Release 3.0
| DDTS Number | SeveritySeveSrity | Functional Area | Problem Description | Corrected |
CSCdp56732 | High | BERT | Creating loopbacks on circuits that are under BERT testing causes future connections on that port to fail creation. Also, half-created or half deleted circuits cannot be fully deleted due to erroneous check. | Creating local loopbacks on circuits under BERT is now blocked. |
CSCdp93716 | High | Redundancy | Race condition in performing forceback can cause lost configuration. | Race condition is resolved with extra synchronization. |
Cisco MGX 8240 CPE/CS3 Switch software (Release 3.0) has some known problems. Every attempt has been made to resolve the problems of high severity. Below are the known problems that remain, including all outstanding problems related to the CES modules and associated I/O ports.
| DDTS Number | SeveritySeveSrity | Functional Area | Problem Description | Workaround/Corrected | |
CSCdr05715 | Low | Connection management | The delete connection -epid all command may not delete all circuits on the card, if the SNMP Timeout VCLI is less than 30 seconds | Retry the command until all connections are deleted. Or Increase SNMP Timeout to 30 seconds. |
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CSCdp84400 | Low | Port management | When the admin state of a physical port (ds3 or ds1) changes from test to up or from up to test, there may be a momentary loss of frames. | No workaround. The impact is low, because user traffic is not running when the port is put into test mode. |
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CSCdr25821 | Low | Craft interface | From a PC or VT-100 terminal, the CMDR on the PSM does not work the same as theCMDR on the IMC. Telnet to an IMC CMDR. But during Telnet to a PSM CMDR, the keyboard does not work the same. When the user types a letter at the login prompt, the password prompt appears. | Use the IMC CMDR to connect to the PSM CMDR. Or use Xterm instead of VT-100 on PC. |
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CSCdp91196 | Low | SNTP | The switch does not validate the primary or secondary server IP address for the Network time protocol. The effect of having an invalid IP address is like having an unreachable IP address. | No workaround |
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CSCdp95989 | Catastrophic | Craft interface | It is possible to set the PSM card's external IP address from a CMDR menu. With Release 3.0, the user is not required to configure the CPI IP address. | No workaround |
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CSCdr26633 | Low | Device drivers | With the current hardware, a switched-in backup PSM card cannot detect the insertion, removal or mismatch of a switched-in I/O card. | No workaround |
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CSCdr53103 | Low | Connection Management | To create a local pl connection on a PSM card, switch software will create two endpoints side-by-side, and cross-connect them. In the current system, one endpoint (half pl connection) could remain in the system if the second endpoint is not created. | Use VCLI command show connection to list the connections on a physical port. Normally, for a local pl connection, 2 endpoints will show. Whenonly one endpoint is listed for a physical port, the user can delete the listed end point. |
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CSCdr 53118 | Low | Connection management | To create a local pl connection on a PSM card, switch software will create two bearer channels for two endpoints, then create internal connection for the bearer channels. As long as a bearer channel is completely created, the swit ch will never back it up unless a user or management application deletes it. | Use the VCLI command show connection to list the connections on a physical port. When this scenario occurs, the connections operational state will be stuck in internal connection down, when it should be up (that is, the admin state will be up, and there are no physical alarms present). |
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CSCdr47002 | Low | Hardware | The hardware does not support Partial Fill values from 20 - 23. for a ds1 channelized ds1 circuit with ESF framing, internal timing and B*ZS coding, traffic runs fine with 24 ,= pf ,= 47. But traffic drops from pf = 20-23 inclusive. This problem is found with both DS3 modes (M23 and Cbit) |
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Sn04752 | Low | Switch Craft Interface | Double ESC required to exit from DS1 statistics window on Craft Interface. |
| Same as 1.1.1.2 |
Sn05554 | High | FE Loopback | If the user manipulates the far-end DS1 loop modes more rapidly than the 1.5 second (the loop send code duration time), the far-end Larscom CSU/DSU and the Cisco MGX 8240 DS1 port are both in a loop up mode. Once this happens, the loop down command issued from Sentient NMS is unable to take Larscom CSU/DSU out of a loop.
| Workaround: 1. On NMS go to the port's Near End Loopback. Invoke a Near End Loopback, then drop the loop. 2. Go to the Far End Loopback and invoke the loop first and then drop it. | Bug found in 1.1.2.10 |
Dm93724 | Low | IO card state | With the introduction of a new IO card type, if a blade is booted without an IO card connected in the back slot, the switch will declare an alarm. Other attributes cannot give accurate information without an IO card present. | The switch expects that an IO card is present when the blade is booted. |
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Cisco MGX 8240 Hardware User's Guide, DOC-7810728=. Gives theory of operations and usage information on the MGX 8240. Details physical description, traffic management, and FDOS.
Cisco MGX 8240 VCLI User's Guide, DOC-7810727=. Gives information on installation and use of Virtual Command Line Interface (V-CLI) for MGX 8240. Details installation, provisioning, and specific commands for VCLI.
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