In this tutorial we’ll learn :
Pushing the IOS image
On the LMS home page, click on the Resource Manager Essentials link.
Click on Software Distribution
Choose a distribution method. By default, I use “by device”. That’s the simplest one
Check the device for which you want to upgrade the IOS and click Next
Players: Catalyst switch with PoE support, Cisco IP phones
Script: We want to check whether there still is enough amount of PoE energy, on a Catalyst switch.
Solution: do a “show power inline”, check the “Remaining” column.
Situation
I tried to register my MGCP gateway to my CUCM, but everytime I did a “show ccm-manager”, it displays the following:
Troubleshooting
I first thought about an issue about DNS on CUCM. I remembered that, during the CUCM installation, I put CUCM somewhere.
So I went to every corner of CUCM admin pages, where I could find the “CUCM” keyword.
I changed some settings in Entreprise Parameters. I even tried to change the hostname under the CUCM CLI mode:
Then, I examined what’s happening at the router level, with “debug mgcp events”. I noticed this line:
Studying for Cisco certifications not enough with only official Cisco Press books. We got to supplement our reading with other documents. for CIP1 exam, I decided to heavily rely on reading from the screen. Why? because a network engineer does not often have the luxury to print all the documents he works with.
Documents I’m reading to supplement my CIPT1 studies:
For example, let’s take Call Survivability. In the Student Guide, it says that call survivability is maintaining the RTP stream between two IP endpoints when the CUCM fails. However, the foundation Guide and I agree that call survivability involves TDM-to-IP-calls too.
Another exemple: does MGCP support call survivability? the Student Guide says no. Maybe it was supported in a later release, you’ll probably say. Read the following line: “Media Gateway Control Protocol has supported call survivability (call preservation) since it was introduced on the gateway routers, but H.323 gateways did not support this feature until Cisco IOS 12.4(9T)”.
I found some interesting blogs about this topic:
Notes:
I struggled a couple of weeks before I came across a great post about installing CUCM on a vmware workstation. I needed this for CIPT1 labs.
Strangely, the website has been taken down due to a hacking attempt.
Well, everything seemed to work fine until the NTP configuration step. Here, I’ve discovered that , when configuring NTP server, make sure your guest machine can connect to the internet and check the public NTP server. So if you have a computer firewall, disable it.
There are times when you want to schedule a router reload, but you don’t want to stay late or come to the office during weekends. “Reload at” is your friend.
You want to reload your router (or switch) at 7pm, but at the same time, you’ll be having a coffee with your friend and you don’t want to have this discussion: “- Sorry guys, I have a router to reboot. I’ll be back in 30mn.
Preparing router to act as a CME:
Later, I will change these values because my router lacked memory resources.
To verify the aforementioned settings:
Let’s create our first ephone-dn:
At this point, my router displayed an error message indicating a lack of memory. I increased its memory size in GNS3:
After a reload, things went ok
I also reduced the max-ephone and max-dn values:
Now we can add ephone-dns without problems:
When I create a dual-line ephone-dn, two “sub-ephone-dn” are created:
To verify ephone-dns:
another way to verify it:
Notice that there are two channels for ephone-dn 2, which is a dual-line ephone-dn.Adding a secondary line to a dual-line ephone-dn:
