Cheat Sheets from Packetlife.net
My friend Josh over at blindhog.net has found a collection of cheat sheet gems for the network dude(tte). There’s sheets on BGP, OSPF, Subnetting, QoS, connector types, and more. Check it out.
This entry was posted by Aaron Conaway on May 28, 2008 at 7:49 am, and is filled under Uncategorized. Follow any responses to this post through RSS 2.0. You can leave a response or trackback from your own site.
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NBAR and HTTP Data Conversations
about 4 days ago - No comments
I’m still working on the ONT test and doing labs, so I marked up a lab for me to work. I’m using the same setup as I did last time. The two routers are 3640s running 12.4(25b).
Part of the lab was to identify HTTP traffic coming into F0/0 and mark it as CS3. That’s More >
QoS Pre-classify and Class-map Order
about 6 days ago - No comments
I’m still studying for the ONT test, so I did some labs tonight. One of them was to demonstrate the qos pre-classify command for tunnel interfaces. When you have a packet sent over a GRE tunnel, the ToS field gets copied to the GRE packet, but there’s no way to see the original packet’s higher-level More >
ONT Notes – QoS On Wireless Networks
about 4 weeks ago - No comments
Imagine that…another ONT notes post. This one is about QoS on wireless networks.
ONT Notes – AutoQoS
about 4 weeks ago - No comments
Here are some more notes from my ONT studies. AutoQoS seems to be pretty straightforward.
ONT Notes – Pre-classify and End-to-end QoS
about 1 month ago - 2 comments
Here are some more ONT notes. We study pre-classifying and end-to-end QoS this time.
ONT Notes – Congestion Avoidance, Policing, Shaping, and Link Efficiency
about 1 month ago - No comments
Here’s another set of notes from my ONT studies.
ONT Notes – Queuing
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 >
ONT Notes – Classification, Marking, and NBAR
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 >
ONT Notes – Intro to QoS
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 >
VLANs on Linux
about 1 year ago - No comments
My home network has a Linux box running IPTables as it’s center point, and, since there are four networks, it has 4 NICs and 4 cables into the switch. I kept running into problems with the NICs (they would reorder depending on what flavor of Linux was installed), so I wanted to consolidate the NICs More >
about 1 year ago
http://www.packetlife.net is ran by a cool dude!. He is also strech in the freenode #cisco IRC Room.
Great site later.