Class

Stubby Post - Time-based ACLs and Policy-maps

2010-04-28 ·2 min read

Certain divisions of the company tend to shoot themselves in the foot by kicking off large file transfers during business hours, so I had a thought that maybe we could use time-based ACLs to do some …

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NBAR and HTTP Data Conversations

2010-03-08 ·3 min read

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 …

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QoS Pre-classify and Class-map Order

2010-03-06 ·4 min read

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 …

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ONT Notes - AutoQoS

2010-02-10 ·2 min read

AutoQoS benefits Automates QoS for most deployments Protects business-critical apps to maximize availability Simplifies QoS deployments Reduces configuration errors Cheaper, faster, and simpler …

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ONT Notes - Pre-classify and End-to-end QoS

2010-02-04 ·2 min read

VPNs (Didn’t ISCW cover this?) Provide Confidentiality Integrity Authentication Types Remote-access Client-initiated NAS-initiated Site-to-site LAN-to-LAN Extranet L3 Tunneling protocols GRE …

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ONT Notes - Congestion Avoidance, Policing, Shaping, and Link Efficiency

2010-02-03 ·2 min read

Tail drop drawbacks TCP synchronization - Dropping TCP packets from different flows can cause them all to window down and back up again at the same time in cycles. TCP starvation - Non-TCP or …

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