Unified CM High Availability / Call Processing Redundancy / Upgrading CUCM Cluster

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Unified CM High Availability Because of the underlying Unified CM clustering mechanism, a Unified Communications System has additional high availability considerations above and beyond hardware platform disk and power component redundancy, physical network location, and connectivity redundancy. This section examines call processing subscriber redundancy considerations, call processing load balancing, and redundancy of additional cluster services. Call Processing Redundancy Unified CM provides the following call processing redundancy configuration options or schemes: Two to one (2:1) — For every two…

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Cisco CUCM : Troubleshoot Backup Issue

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Hi Guys , I found below link useful when troubleshooting CUPS backup issues, Original Link # https://bsoftbangalore.wordpress.com/2012/06/14/cisco-cucm-7-x8-x-troubleshoot-backup-issue/ Cisco Unified Communications Manager backups are not running as scheduled. All Disaster Recovery Framework (DRF) services are down, and no new devices, schedules, or statuses can be viewed from the DRF console. Also, when you access the DRF admin pages, this error message is received: Status: Local Agent is not responding. This may be due to Master or…

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BUG CSCsr87199 ; DRS backup never releases lock – stops performing backups

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DRS backup never releases lock – stops performing backups CSCsr87199 Description Symptom:– DRS Backups stop executing automatically. – When you attempt a manual backup, you get an error saying: “Backup operation currently in progress…. please wait and try after sometime” – When trying to install a new version or a COP file, you get the following error: “The system is currently locked by another process. Please try again later” Conditions: Occurs if DRF is scheduled…

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UCS: Invalid Keyring certificate alert on UCSM

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Problem Description: Invalid Keyring certificate alert on UCSM Action Plan: Went on call and saw the keyring had expired: EXB-B /security/keyring # show det Keyring default:     RSA key modulus: Mod2048     Trustpoint CA:     Cert Status: Expired – Closed the UCSM GUI, and regenerated the keyring. # scope security /security # scope keyring default /security/keyring # set regenerate yes /security/keyring *# commit-buffer EXB-B /security/keyring # show det Keyring default:     RSA key modulus: Mod2048…

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N9K Remote Python

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original Link # https://github.com/datacenter/nexus9000 # Copyright (C) 2013 Cisco Systems Inc. # All rights reserved import sys sys.path.append(“./cisco”) sys.path.append(“./utils”) from nxapi_utils import NXAPITransport from cisco.interface import Interface ################### # NXAPI init block ################### target_url = “http://10.30.14.8/ins” username = “admin” password = “admin” NXAPITransport.init(target_url=target_url, username=username, password=password) ################### ################### # cli/clip/clid are changed a bit, but largely the same ################### print NXAPITransport.cli(“show version“) NXAPITransport.clip(“show interface brief“) NXAPITransport.clic(“conf t ;interface eth4/1 ;no shut“) print NXAPITransport.clid(“show version“) ################### #…

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Troubleshooting CUCM Database Replication in Linux Appliance Model

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  CUCM Database Replication is an area in which Cisco customers and partners have asked for more in-depth training in being able to properly assess a replication problem and potentially resolve an issue without involving TAC.  This document discusses the basics needed to effectively troubleshoot and resolve replication issues. Replication Architecture CUCM 5.x Replication Architecture Communications Manager 5.x has a similar replication topology to Callmanager 4.X. They both follow a hub and spoke topology. The…

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ACE Load Balancing Briefing with Examples of HTTP

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ACE Load Balancing Briefing with Examples of HTTP   Configuration  Sequence 1- Servers 2-  Server Farm 3-Define Class-map for Virtual IP Address  [ that will be used to receive request for Load Balancing Servers  ] 4- Policy for Sever Farm 5- Policy for Load Balancing # Defining Servers server host SERVER1 ip address 172.168.12.10 inservice rserver host SERVER2 ip address 192.168.12.11 inservice rserver host SERVER3 ip address 192.168.12.12 inservice rserver host SERVER4 ip address 192.168.12.13…

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BUG CSCue31224 [ CUC 9.x and Exchange 2010 SIB UM doesn’t work for large mailboxes ]

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Symptom: Customer has certain users that you can’t get SIB UM to work yet many others on the same Exchange 2010 and mailstore works fine. They see this for the users affected in the SIB traces… =================== 11:28:14.184 |16230,outlook.office365.com,{98c6481a-fa6e-483f-815e-fa6a9a81b250},CsEws,14,1:0) Header: 11:28:14.184 |16230,outlook.office365.com,{98c6481a-fa6e-483f-815e-fa6a9a81b250},CsEws,14,2:0) FindItemResponseMessage_ResponseClass: Error 11:28:14.184 |16230,outlook.office365.com,{98c6481a-fa6e-483f-815e-fa6a9a81b250},CsEws,14,2:1) MessageText: The server cannot service this request right now. Try again later. 11:28:14.184 |16230,outlook.office365.com,{98c6481a-fa6e-483f-815e-fa6a9a81b250},CsEws,14,3:0) ResponseCode: ErrorServerBusy . . . 11:28:16.257 |16230,outlook.office365.com,{98c6481a-fa6e-483f-815e-fa6a9a81b250},CsMbxSync,23, m_spExchMailStoreProvider->GetMessages() FAILED – hr = 0x80046F04: E_MC_COULD_NOT_CONNECT on…

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BUG-CSCuq55508

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Hi Guys, While working with CUCM 9.1.XXX i faced some rare issues when performing normal tasks , we start getting below errors  and while working with Cisco TAC  they informed it a BUG and they provided a customized image UCSInstall_UCOS_9.1.2.13055-1.sgn.iso  to fix it permanently:   Symptom: -Slow web access and dbreplcation issues -Database Communications Errors -Unmapped Exception java.sql Exception : Memory Allocation failed during query processing -Unmapped exception java.sqlException: Cannot initiate sort -Error occured while retriveing…

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Spanning Tree Design Notes

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Spanning Tree Design Notes     BPDU Filter Spanning tree port fast  –> Always use BPDU Filter BPDU Filter will filter [ NOT SEND Or Receive ]  BPDUs on the that port , usually recommended on the Port fast connected to END Hosts. BPDU Guard====> Trunk ports —> Always  use BPDU Guard on the ROOT SWITCH doing down to the other Switch , This is to save the Root switch , instead of getting another…

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