Monday, September 29, 2008
CCVP Complete!
CCVP certification path is now complete! Finished with CIPT and QoS. More to write soon.
Thursday, August 21, 2008
Good resource
A nice collection of links here. Found some Packeteer Packetshaper Visio stenciles through this website.
Sunday, August 17, 2008
Friday, August 15, 2008
Calculating DSP requirements
Understanding Codecs: Complexity, Hardware Support, MOS, and Negotiation explains the issues involved, and also contains a tool for calculating the DSP requirements. Requires a CCO account. Useful for specing out equipment based on customer requirements.
Wednesday, August 13, 2008
QoS Configuration Checklist
Configuring Access Layer QoS for Voice on Cisco Catalyst 6500 with Cisco IOS SW
For the Cisco Catalyst 6500 to act as an access switch for a Cisco 7940/7960/7970 IP phone + PC, using a "full trust" policy, the following is required:
1. Enable switchwide QoS.
2. Configure interfaces used for IP phones:
• Enable trust so the switch accepts the phone class-of-service (CoS) markings.
• Extend the trust boundary to the access port on the IP phone and mark PC traffic as CoS = 0.
• Enable input queue scheduling.
• Configure CoS-to-queue mapping.
• Configure output scheduling.
• Configure CoS-to-differentiated services code point (DSCP) mapping.
• Optionally configure a policy for additional application traffic marking or policing (not covered).
3. Configure the uplink interfaces to the distribution switch:
• Enable trust to accept markings from the distribution switch. This can be either CoS or DSCP trust.
• Enable input queue scheduling.
• Configure CoS-to-queue mapping.
• Configure output scheduling.
• Verify and configure CoS-to-DSCP mapping.
• Optionally configure a policy for additional application traffic marking or policing (not covered).
For the Cisco Catalyst 6500 to act as an access switch for a Cisco 7940/7960/7970 IP phone + PC, using a "full trust" policy, the following is required:
1. Enable switchwide QoS.
2. Configure interfaces used for IP phones:
• Enable trust so the switch accepts the phone class-of-service (CoS) markings.
• Extend the trust boundary to the access port on the IP phone and mark PC traffic as CoS = 0.
• Enable input queue scheduling.
• Configure CoS-to-queue mapping.
• Configure output scheduling.
• Configure CoS-to-differentiated services code point (DSCP) mapping.
• Optionally configure a policy for additional application traffic marking or policing (not covered).
3. Configure the uplink interfaces to the distribution switch:
• Enable trust to accept markings from the distribution switch. This can be either CoS or DSCP trust.
• Enable input queue scheduling.
• Configure CoS-to-queue mapping.
• Configure output scheduling.
• Verify and configure CoS-to-DSCP mapping.
• Optionally configure a policy for additional application traffic marking or policing (not covered).
Thursday, August 7, 2008
IPExpert and GWGK
A lot has happened recently.
I passed the TUC exam. Then I won the IP Expert CCIE Voice End-to-End Learning / Blended Learning Solution. Here's a description:
End-to-End Program
I received the hard drive and I must say the videos are fun to watch. I also sampled some lab time by scheduling a lab session on their Vrack a couple Saturdays ago and I must say that I am very happy and impressed.
Their materials have already been helping me with studying for the CCVP. In preparation for the upcoming GWGK exam, I'll be scheduling a rack session to go over setting up a gateway/gatekeeper.
In addition to IPExpert, I am primarily using Cisco Voice Gateways and Gatekeepers by Cisco Press (using a safari.orielly account) in preparation for the exam, as well as the Quick Study Guide.
This will be a more challenging exam for me than TUC was as I've done a lot of troubleshooting at work with Callmanager 4.x but I haven't done much on the gateway side, and very little with gatekeepers.
I was planning to take the GWGK this Saturday, but I'm not even halfway thru this book yet... I'll reschedule for next week.
On a "bigger picture" side, for all the VAR consultants out there, another fun link I recently found on Cisco's website was this:
How do I implement Unified Communications?
A fantastic resource for getting prepped to talk to customers about this stuff. Great case studies, blueprints, and check lists.
I passed the TUC exam. Then I won the IP Expert CCIE Voice End-to-End Learning / Blended Learning Solution. Here's a description:
End-to-End Program
I received the hard drive and I must say the videos are fun to watch. I also sampled some lab time by scheduling a lab session on their Vrack a couple Saturdays ago and I must say that I am very happy and impressed.
Their materials have already been helping me with studying for the CCVP. In preparation for the upcoming GWGK exam, I'll be scheduling a rack session to go over setting up a gateway/gatekeeper.
In addition to IPExpert, I am primarily using Cisco Voice Gateways and Gatekeepers by Cisco Press (using a safari.orielly account) in preparation for the exam, as well as the Quick Study Guide.
This will be a more challenging exam for me than TUC was as I've done a lot of troubleshooting at work with Callmanager 4.x but I haven't done much on the gateway side, and very little with gatekeepers.
I was planning to take the GWGK this Saturday, but I'm not even halfway thru this book yet... I'll reschedule for next week.
On a "bigger picture" side, for all the VAR consultants out there, another fun link I recently found on Cisco's website was this:
How do I implement Unified Communications?
A fantastic resource for getting prepped to talk to customers about this stuff. Great case studies, blueprints, and check lists.
Saturday, July 12, 2008
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