Josh over at Blindhog.net has an article linking to a bunch of Cisco IP Phone videos — from the 7906 to the 7975. These are Cisco videos and a good place to start if you don’t know anything about their IP phones.
about 4 weeks ago - No comments
Here are some more notes from my ONT studies. AutoQoS seems to be pretty straightforward.
about 1 month ago - 2 comments
Here are some more ONT notes. We study pre-classifying and end-to-end QoS this time.
about 1 month ago - No comments
Here’s another set of notes from my ONT studies.
about 1 month ago - No comments
Here are some more notes from my studies. Of course, no one cares about them but me, but it’s my blog. I’m sure someone will find it useful. Please help to correct dumbass mistakes.
Congestion
Speed mismatch – traffic leaves a lower-bandwidth interface than the one it came in on
Aggregation problem – lots of links with one More >
about 1 month ago - No comments
Here’s another set of notes from my ONT studies. I’m sure someone will find it useful. Please help to correct dumbass mistakes.
Classification is done with traffic desriptors
Ingress interface
CoS value on ISL or 802.1P frames
Source/destination IP address
IP Precedence or DSCP value
MPLS EXP
Application type
Layer 3 QoS
Type of Service (ToS) is 8-bit field.
First 3 bits of ToS are More >
about 1 month ago - No comments
I’ll try to keep it a little shorter this time.
Major issues for converged enterprise networks
Available bandwidth: competition among applications
Fixes
Increase bandwidth: More power!
Properly queue based on classification and marking: QoS
Compress: cRTP, TCP header compression, etc.
Delay: Lead time to get a packet to the destination
Types of delay
Processing delay: routing, switch delay
Queuing delay: how long a frame stays More >
about 2 months ago - No comments
Here are some of the notes I’ve been taking while reading over the ONT book. I hope it benefits somebody. Feel free to correct any stupid mistakes as a paraphrase to avoid a lawsuit.
There’s way too much info here. I’ll refine the process a little better for the next topics.
Benefits of Packet Telephony Networks
More More >
