400-051 - IAmJoost.com

MGCP Flows

September 10, 2021December 26, 2015 by Joost van der Made

It’s something I didn’t do in many many years, that’s why I create this post. Just for me to find all the information for the next time when I will have to configure MGCP.

MGCP Verbs :

Command	Message Name	Sent By	Description
AUEP	AuditEndpoint	CallManager	Get the status of a given endpoint.
AUCX	AuditConnection	CallManager	Retrieves all the parameters associated with a connection.
CRCX	CreateConnection	CallManager	Creates a connection between two endpoints.
DLCX	DeleteConnection	Both	From CallManager:Terminates a current connection. From Gateway:Indicates that a connection can no longer be sustained.
MDCX	ModifyConnection	CallManager	Changes the parameters (Update info) associated with an established connection.
RQNT	NotificationRequest	CallManager	Instructs the gateway to watch for special events such as hooks or DTMF tones. It is also used to instruct the gateway to provide a signal to the endpoint (for example, dial tone and busy tone).
NTFY	Notify	Gateway	Informs the Cisco CallManager when requested events occur.
RSIP	RestartInProgress	Gateway	Informs the Cisco CallManager that an endpoint or group of endpoints are taken out or placed back into service.
EPCF	Endpoint configuration	Callmanager	Alert configuration of the endpoint(things like gain level, codec, etc

Personal Notes on Qos on Cisco 2960

November 13, 2020December 25, 2015 by Joost van der Made

I wanted to see what happens when you configure egress Qos with SRR. To accomplish this, I create a policy-map which set the DSCP 40 for WWW traffic.

ip access-list extended ACL_HTTP
 permit tcp any any eq www

class-map match-all CM_HTTP
 match access-group name ACL_HTTP
!
!
policy-map PM_QOS
 class CM_HTTP
 set dscp cs5

interface FastEthernet0/1
 description laptop
 mls qos trust device cisco-phone
 service-policy input PM_QOS

I got a PC and Laptop connected via a Cisco 2960. On the PC I run iperf.exe on the default port and on port 80. On the laptop I have also 2 client iperf running.

Verify the CUCM DB Replication

November 13, 2020December 25, 2015 by Joost van der Made

So you got a Publisher and a Subscriber. And how do you know that they are on the same page ? Is the DB Replication working correctly ?

To verify the DB Replication status you can use :

Real Time Monitoring Tool
CLI
System Reports.

RTMT :

Everything was running fine until the Sub died.

SIP & SCCP Phone flow CUCM

November 13, 2020December 18, 2015 by Joost van der Made

Here are some flows of a SIP & SCCP phone call. My purpose was to see is it really only digit-by-digit dialing even when the phone is on hook.

SCCP

on-hook dialing : EnBloc

off-hook dialing : Digit by Digit

SIP

type B on-hook dialing no dial-rules : EnBloc

type B off-hook dialing no dial-rules : Digit by Digit with KPML event

CCIE Collaboration written 400-051 notes.

December 16, 2015 by Joost van der Made

Here are some thing that is nice to know. Of course check the blueprint to see what is recommended reading.

Cisco Unified IP Phone Firmware Distribution Methods

Table 1. Summary of Distribution Models

	Peer Firmware Sharing	Load Server	Traditional TFTP
Advantages	• Hierarchy is automatic • One download per phone model on a subnet • Uses TCP • Fails back to TFTP • Speeds up LAN upgrades • Reduces TFTP CPU load during upgrade	• Has same download time as LAN image distribution • Distributes TFTP load over multiple TFTP servers	• Proven distribution • Default behavior
Disadvantages	• Must be enabled on each phone • Hierarchy is formed for each phone model • Hierarchy is limited to subnet	• IP must be set on each phone • Administrator must manually file copy to load server • No failback to TFTP on error • More prone to user error	• High-bandwidth requirements • Multiple requests for same file • High CPU usage on TFTP server

Link : http://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phones-9900-series/white_paper_c11-583891.html