virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: notes: Policing
http://virtualrack.blogspot.com/2011/11/notes-policing.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Wednesday, November 9, 2011. Traffic-policing is designed to drop traffic in excess of the target rate, and enforce a max threshold of bandwidth. To accomplish this, a system of credits is used. Before a packet can be sent the amount of credits equaling the packet's size in bits must have been earned, like wages. Limits the rate of traffic on the interface.
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: notes: Shaping
http://virtualrack.blogspot.com/2011/11/notes-shaping.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Monday, November 7, 2011. Only applies to outbound traffic. Queueing mechanisms can be used in conjunction with traffic shaping. Traffic shaping delay packets to ensure that a class of packets does not exceed a defined rate. While delaying the packets, the shaping function queues the packets, by default in a FIFO queue. 2 Types of Shaping. The Tc cannot be a...
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: notes: Legacy Custom Queuing
http://virtualrack.blogspot.com/2011/11/notes-legacy-custom-queuing.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Thursday, November 3, 2011. Notes: Legacy Custom Queuing. Implementation of weighted round robin. Up to 16 configurable queues, including a priority queue. Thresholds are based on the number of bytes and/or number of packets. CQ is prone to inaccurate bandwidth allocations. Can only apply one mechanism per interface. MQC changes this. Byte-count = 1500 bytes.
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: notes: QoS in Switches
http://virtualrack.blogspot.com/2011/11/cos-class-of-service-is-also-known-as.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Wednesday, November 16, 2011. Notes: QoS in Switches. COS (Class of Service), is also known as 802.1p priority bits. QOS must be enabled on a switch with "mls qos". With "mls qos" OFF the switch does not modify any markings. With "mls qos" ON switch clears all COS, ip-prec, and DCSP, unless the trust configuration was specified. Mls qos cos override. The wei...
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: notes: WFQ
http://virtualrack.blogspot.com/2011/11/notes-wfq.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Wednesday, November 2, 2011. Dynamically allocates flows into queues. The allocation is not configurable, only the number of queues are configurable. Guarantees throughput to all flows, and drops packets of most aggressive flows. Default on Cisco interface below 2.048mb. Cannot provide fixed bandwidth guarantees. Enables WFQ on an interface. 8211; Number of ...
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: notes: AutoQoS
http://virtualrack.blogspot.com/2011/11/autoqos-automates-deployment-of-quality.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Wednesday, November 16, 2011. Autoqos automates the deployment of quality of service (QOS) policies. Any existing QOS policies must be removed before the autoqos-generated polices are applied. Autoqos is supported only on the IP Plus image for low-end platforms. Ensure that autoqos is enabled on both sides of the network link. Uses NBAR-based protocol discov...
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: notes: RSVP (Resource Reservation Protocol)
http://virtualrack.blogspot.com/2011/11/rsvp-on-it-own-is-just-reservation-tool.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Wednesday, November 16, 2011. Notes: RSVP (Resource Reservation Protocol). RSVP on it own is just a reservation tool in the control plane, still require external mechanism to enforce the mechanism. Allows end user application to make bandwidth reservations inside the network. WFQ required for RSVP, gets disabled by default with traffic-shape.
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: November 2011
http://virtualrack.blogspot.com/2011_11_01_archive.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Wednesday, November 16, 2011. Optimizing links for maximum payload throughput" is exam speak for compression. If files are already compressed or in a compressed format, it is recommended to not use compression. Is a mechanism that compresses the TCP header in a data packet before the packet is transmitted. Configured with ip tcp header-compression. Passive] ...
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: October 2011
http://virtualrack.blogspot.com/2011_10_01_archive.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Monday, October 31, 2011. NBAR is a classification engine that can identify traffic/protocols at an application level. NBAR looks into the TCP/UDP payload itself and classifies packets based on content within the payload such as that transaction. Identifier, message type, or other similar data. Domain Hostname - The URL portion between ' http:/ '. Ip nbar pd...
virtualrack.blogspot.com
VIRTUALRACK for Network Engineers: September 2011
http://virtualrack.blogspot.com/2011_09_01_archive.html
VIRTUALRACK for Network Engineers. This blog is all about networking technologies that drives the human network today. Welcome to the Human Network! Wednesday, September 28, 2011. Shutdown the BGP peering link between AS 100 and AS 300. Create a new Loopback1 interface in SW1 with the IP address 150.1.77.77/24 and advertise it into BGP. Configure R1 and R4 so that they prefer reaching the new subnet via EIGRP as opposed to eBGP. Ip address 150.1.77.77 255.255.255.0. Network 150.1.0.0. Route metric is 158...