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Mac addresses are physical addresses at layer 2 of the OSI model . How does it work ! Hosts on a network will listen for packets that have their MAC address in the destination field of the packet . The…
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VTP Pruning reduce the unnecessary flooded traffic by forwarding the unknown unicast frames on a VLAN over trunk links only if the receiving end of the trunk has ports in that VLAN. VTP Pruning is disabled by default and can be…
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When you put a switchport into trunking mode, it will trunk and it will try to negotiate. Dynamic auto will wait for a request to trunk, so if the other side is set to trunk, a trunk will form. If…
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Configuration of DHCP : (config)#ip dhcp excluded-address (1st ip address) (last ip address) (config)#ip dhcp pool (name of the pool) (dhcp-config)#network (network address) (mask) (dhcp-config)#default-router (default router ip address) (dhcp-config)#dns-server (ip address of dns server) (dhcp-config)#domain-name (name of domain) (dhcp-config)#lease…
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An NTP service receives its time information from a time source with a higher level of authority than itself. The authority of a particular time servicer is indicated by its stratum. An NTP server that connects directly to an authoritative,…
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This post will be updated often ! Any form of access to a network device should be authenticated so we need to configure users . ( see Users Post ) Password are not encrypted by default , you can configure…
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You can create Users access by creating different privilege levels : (config)#privilege exec level ( level # ) (command) In the following example, the show ip route command is set to privilege level 15. To keep all show ip and show…
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Creating users can be done in global configuration mode : (config)#username (name) password (word) OR (config)#username (name) privilege ( 0-15 ) password (word)
To access a remote Cisco Router you can configure it in global mode : (config)#line vty 0 4 (config-line)#login Local ( see creating a user ) OR (config-line)#password (password) Dont forget that your password is save in plain text so…
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(config-if)#ip host (name) (ip address)