Patrick Denis > Cisco
Cisco
admin
December 18, 2016
The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity, capabilities, and neighbors The protocol is formally referred to by the IEEE as Station and…
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admin
December 18, 2016
CDP stand for Cisco Discovery Protocol and is a Cisco Proprietary Protocol and Interfaces must support SNAP ( Support Subnetwork Access Protocol ) Headers The standard industry equivalent is LLDP. CDP isn’t just a simple protocol there is more…
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admin
October 8, 2016
admin
September 28, 2016
Regular Expressions A regular expression is a pattern (a phrase, number, or more complex pattern). Regular expressions are case sensitive and allow for complex matching requirements. Simple regular expressions include entries like Serial, misses, or 138. Complex regular expressions include…
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admin
July 15, 2016
This post is about what i have encounter and some debate around thy is subject. Some say that vlan1 should be use and some say that it should not. On part my part and point of view of my little…
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admin
May 30, 2016
BFD Operation BFD provides a low-overhead, short-duration method of detecting failures in the forwarding path between two adjacent routers, including the interfaces, data links, and forwarding planes. BFD is a detection protocol that you enable at the interface and routing…
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admin
May 18, 2016
The IPV4 Option is in the IHL ‘Internet Header Length’ Field, it is a minimum value of 5 and if it is that mean that there is no options configured and we have a 20 bytes ip header. The Internet…
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admin
May 14, 2016
IP Maximum Transmission Unit (MTU) IPv4 routers will fragment automatically to fit within the MTU (unless DF – Don’t Fragment option is set). IPv6 routers will not fragment, and will drop packets that are larger than MTU. IPv4 requires that…
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admin
May 14, 2016
Time to live (TTL) is a hop limit set to limit the lifetime of data on a network. This prevents data from looping endlessly. Each hop decrements the value by 1. If TTL reaches 0, the data is discarded and…
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admin
May 13, 2016
ICMP offers troubleshooting facility as well as error reporting for the packets 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2…
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