Guys, we all know about debug isdn q931 output message, I've 4 doubts in that. (which are in highlighted form in the attached snapshot) What is meaning & use of Channel ID [which is i = 0xA9839F in our case] (Line 30) ? What is pd & what does that mean  (Line 31) ? What does this mean i = 0x0081 (Line 10) (I thing I know about this that this value is in hexadecimal, after that 0081 represent what ?)         & i = 0x80 (Line 12) Please check the attached snapshot for your reference. Thank you in advance. ... View more

Hi Guys, I just ran a sh isdn status command on voice gateway & found that layer 2 status is looking weird, Is there anyone who knows, why is that ? Here is the output: cpp-vgw-1#sh isdn st Global ISDN Switchtype = primary-4ess %Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply ISDN Serial1/0:15 interface         dsl 0, interface ISDN Switchtype = primary-net5         L2 Protocol = Q.921 0x0000  L3 Protocol(s) = CCM MANAGER 0x0003     Layer 1 Status:         ACTIVE     Layer 2 Status:         TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED         TEI = 0, Ces = 1, SAPI = 63, State = TEI_ASSIGNED     Layer 3 Status:         0 Active La     Active dsl 0 CCBs = 0     The Free Channel Mask:  0xFFFF7FFF     Number of L2 Discards = 0, L2 Session ID = 91 ... View more

[PROBLEM]: In a Cisco Unified Communications Manager cluster that has a few subscribers and a publisher, when you try to login to the publisher after entering the username and password, the [Database Communication Error] error message appears> TO VIEW, HOW THE ERROR LOOKS_LIKE & WHERE IT DISPLAYS, DOWNLOAD THE ATTACHED FILE 1.PNG (AT LAST OF THIS DOC) Database Communication Error when Logging into the Cisco Unified Communications Manager Publisher Server: When trying to login to the Cisco Unified Communications Manager (CUCM) Publisher server, the [Database Communication Error] error message appears. This document provides information, how to troubleshoot this issue> To Troubleshoot this issue, Cisco Recommends that you must have knowledge of these topics: · Cisco Unified Communications Manager 6.1 and later Solution 1> 1. Revert the changes made back to the old settings in order to let you log in. 2. Go to Cisco Unified CM Administration > System > Server and make the required changes for the hostname or IP address. 3. Make the same changes via CLI or the OS admin page. The CUCM will restart itself. 4. After restarting check if services are loaded properly. 5. Use the utils service list CLI command in order to check if the services are up and running. 6. Restart the whole cluster manually again to have all the services loaded properly. ___________________________________ Solution 2> If there were no changes made to the CUCM Publisher and you still receive the Database Communications Error error message, then complete this procedure to resolve the issue: 1. Check the database replication status on all the CUCM nodes (publisher and each subscriber) in the cluster to ensure that all servers replicate database changes successfully. You can check the replication state with RTMT by accessing the Database Summary and inspecting the replication status. The Number of Replicates Created and State of Replication object provides information about the replication state on the system. Status 2 indicates that the replication is good. If you receive a status number of 3 or 4, it indicates either a broken database or that replication is not set up correctly between the publisher and subscribers. If the Database Summary indicates that the replication on the Publisher is 2 and on the Subscribers is 3, go to the next step. 2. Check the DB replication using the utils dbreplication status CLI command and check what the output shows. If there are mismatched rows reported in the output file, run the utils dbreplication repair all CLI command to synchronize tables on all nodes. 3. Run the utils dbreplication stop command in all the subscribers and on the publisher. Then run the utils dbreplication reset all to reset replication on publisher and all subscribers. This command might take some time to complete. 4. After you run the commands, Verify it in RTMT. If the replication status shows 2 for both the Publisher and the Subscribers, then the issue is resolved. [ IT SHOULD LOOK LIKE 2.PNG, ATTACHED FILE ] You should be able to login to the Publisher and Subscribers without any error. Note: If the issue is not resolved after you complete the above steps, restart the DBL service. _________________________________________________________ Problem> A problem that can occur is the inability to access the Cisco Unified CM administration page of the publisher from the site because of database communication error informix not accepting any more connections. All connections are eaten by dbcef. The utils dbreplication runtimestate does not work: admin:utils dbreplication runtimestate Traceback (most recent call last): File "/usr/local/cm/bin/DbReplRTstate.py", line 578, in ? fin = open(tfile, 'r') IOError: [Errno 2] No such file or directory: '/var/log/active/cm/trace/dbl/sdi/getNodes' This issue is also documented by Cisco bug ID CSCtl74037 (For Registered Customers Only). Solution> It appears this network's disconnects/flaps can help this issue to appear as connections between CEF and DB are not properly closed. The CEF connection leak occurs mainly in these two cases: > There is a pub−sub cluster, and the network goes down. The CEF service is stopped on the pub. As a result, the subscribers run an algorithm to determine the host who will take over those tasks. > In order to resolve this from the CLI, issue the command: · utils service stop A Cisco DB · utils service start A Cisco DB · Stop the CEF service from serviceability page _________________________________________________________ This Document is Based on these Software & Hardware Versions: CUCM 7.0.2 Source: Document ID: 111040 (Updated: Nov 18, 2009) Thanks: Mohit Grover ... View more

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Cisco MCS 7845-H2 Processor Specifications: Maximum processors = 2 Processors installed = 2 Basic input/output system (BIOS) type = Flash Memory Specifications: Memory maximum = 32 GB Memory bus clock = 667 MHz Memory technology = PC2-5300 667-MHz DDR2 synchronous dynamic RAM (SDRAM) Fully Buffered DIMMs Multibit error mitigation = Advanced Error Checking and Correcting (AECC) Total RAM slots = 8 RAID Controller Specifications: Controller model = HP Smart Array P400 Controller Interface = PCI Express Cache = 256 MB Battery-backed write cache = Yes RAID levels supported = 1 Hard Disk Specifications: Hot-swappable bays = 8 Hard disk interface type = SAS Hard disk revolutions per minute (rpm) = 10,000 Hard disk average seek time = 4 ms Data-transfer rate = 300 MB per second Network Interface Specifications: Ethernet network interface card (NIC) = Dual onboard 10/100/1000 Ethernet connectors = Two RJ-45 connectors on back of server 10BASE-T cable support = EIA Category 3, 4, or 5 unshielded twisted pair (UTP) (2 or 4 pair) up to 328 ft (100m) 100BASE-TX cable support = EIA Category 5 UTP (2 pair) up to 328 ft (100m) 1000BASE-T cable support = EIA Category 6 UTP (recommended), 5E UTP, 5 UTP (2 pair) up to 328 ft (100m) Interface Port Specifications: Serial ports = 1 Parallel ports = 0 USB 2.0 ports = 5 (2 front, 2 back, and 1 inside) Keyboard ports = 1 PS/2 Mouse ports = 1 PS/2 Audio ports = None System management ports = RJ-45 for HP iLO 2 dedicated Ethernet ports Video Graphics Array (VGA) ports = 1 front and 1 back Security capabilities of the Cisco MCS 7845-H2 follow: •    Power-on password •    Keyboard password •    Selectable boot device •    Diskette drive control •    QuickLock, network server mode •    Serial interface control •    Administrator’s password •    Disk configuration lock The Cisco MCS 7845-H2 complies with the following standards: 1.    Advanced configuration and power interface (ACPI) 2.0 compliant 2.    PCI 2.2 compliant 3.    Wake-on-LAN (WoL) support 4.    Microsoft Logo certifications 5.    USB 2.0 support Product Overview: High-availability server platform for Cisco Unified Communications Solutions. Complete, scalable architecture for a new generation of high-quality IP voice solutions that run on enterprise data networks. Easy to deploy and highly cost-effective. Delivers the high performance and availability At only 2 rack units (2RUs) high, the Cisco MCS 7845-H2 packs tremendous power in a low-profile chassis that minimizes rack space. Applications Supported: The Cisco MCS 7845-H2 can run any of the following Cisco applications: 1.    Cisco Unified Application Environment 2.    Cisco Unified Communications Manager: Up to 7,500 Cisco Unified IP Phones per server 3.    Cisco Emergency Responder; Up to 30,000 Cisco Unified IP Phones per server 4.    Cisco Unified Presence 5.    Cisco Unified Intelligent Contact Management Enterprise 6.    Cisco Unified Intelligent Contact Management Hosted 7.    Cisco Unified Contact Center Enterprise 8.    Cisco Unified Contact Center Hosted 9.    Cisco Unified Contact Center Express 10.    Cisco Unified Expert Advisor 11.    Cisco IPICS 12.    Cisco Unified IP IVR 13.    Cisco Unified Customer Voice Portal 14.    Cisco Unified MeetingPlace conferencing 15.    Cisco Unified MeetingPlace Express 16.    Cisco Unity unified messaging Benefits & Key Features: Performance & High Availability: highly available server platform It uses a Smart Array P400 Controller with 256-MB cache to provide onboard redundant Array of Independent Disks (RAID) support. At product introduction, the Cisco MCS 7845-H2 will ship with two Intel Xeon 2.33-GHz processors. Redundant hot-swap power supplies Redundant hot-swap fans Hot-swap SAS hard drives configured using RAID 1 Serviceability: System Health LEDs: The Cisco MCS 7845-H2 provides system health LEDs and unit identification lights on the front and back of the server to make pinpointing system problems easier than ever. When an internal component fails, this indication is made on an internal component LED (amber) and on the front panel of the Cisco MCS  7845-H2. If the item is serviceable without removing the server hood, as in the case of a redundant power supply, the external health LED illuminates. If the item is serviceable by removing the hood, as in the case of a fan failure, the internal health LED illuminates. If no failures have occurred, the system health LEDs are green. If a failure has occurred but a redundant feature has enabled the system to continue running, the LED is amber. If the failure is critical and has caused the system to shut down, the LED is red. Integrated Lights Out 2 (iLO 2): The Integrated Lights Out 2 (iLO 2) standard is included on the motherboard. Combining essential management functions and diagnostics with basic lights-out functions as standard components of the server, iLO 2 is available at no charge. DAT Tape Support: The Cisco MCS 7845-H2 can support an optional 36/72-GB universal-serial-bus (USB) external Digital Audio Tape (DAT) drive or an optional USB rack-mount DAT drive. This tape drive connects through one of the 4 USB 2.0 ports provided by the Cisco MCS-7845-H2. The external DAT drive is orderable using part number DAT-USB-EXT-72=, and the rack-mounted 36/72-GB DAT drive is orderable using part number DAT-USB-RM-72=. Warranty Information: Cisco offers a 1-year limited hardware warranty on Cisco Media Convergence Servers. For more Information, about CISCO 7800 MCS Servers: Follow the Link:> http://www.cisco.com/go/mcs Source: Cisco MCS 7845-H2 (DATA SHEET) Thanks: Mohit Grover ... View more