Mar 9 2009 5:14AM GMT
Posted by: Yasir Irfan
VLAN Trunking Protocol,
VTP,
Cisco Proprietary,
Layer 2,
Cisco,
IEEE,
Cisco Catalyst Switches,
Switches,
VTP Overview,
What is VTP,
VTP Domain,
GVRP
What do you think what happens? If a new Cisco Catalyst® switch is placed between any two VTP domains, the Cisco Catalyst® switch will join the VTP domain identified by the first VTP update it receives. Just check the below example.
The VTP domain can be changed to another in a Cisco Catalyst® switch by using the CLI prompt, this is the only way you can change.
Feb 25 2009 11:23AM GMT
Posted by: Yasir Irfan
VLAN Trunking Protocol,
VTP,
Cisco Proprietary,
Layer 2,
Cisco,
IEEE,
Cisco Catalyst Switches,
Switches,
VTP Overview,
What is VTP,
VTP Domain,
GVRP
In Cisco Catalyst® switches the VTP domain can be added through CLI configuration or else it can be learnt from an adjacent VTP Cisco Catalyst® switch. Let’s see this from the below example
Switch C is added to the network connecting via a trunk port to Switch B with no VTP domain configured, in this mode when the Switch C receives the first VTP update from the adjacent Switch B , it will become the part of the VTP domain ITKE as identified in the VTP update.
Feb 23 2009 6:35AM GMT
Posted by: Yasir Irfan
VLAN Trunking Protocol,
VTP,
Cisco Proprietary,
Layer 2,
Cisco,
IEEE,
Cisco Catalyst Switches,
Switches,
VTP Overview,
What is VTP,
VTP Domain,
GVRP
In my previous post I just introduced the VLAN trunking protocol; let’s talk about the VTP domain.
The VTP domain consists of a group of logical group of Cisco Catalyst Switches that are part of the same VTP management domain. A Cisco Catalyst Switch can belong only to one VTP domain at any time,
The VTP domain is a logical group of switches that will share VLAN information. Each switch can belong only to one VTP domain in addition to sharing the VLAN information with all other Cisco Catalyst Switches in the same VTP domain. Cisco Catalyst Switches in different VTP domains drops any VTP updates received from Cisco Catalyst Switches.
Feb 21 2009 6:21AM GMT
Posted by: Yasir Irfan
VLAN Trunking Protocol,
VTP,
Cisco Proprietary,
Layer 2,
Cisco,
IEEE,
Cisco Catalyst Switches,
Switches,
VTP Overview,
What is VTP,
VTP Domain,
GVRP
What is a VLAN Trunking Protocol (VTP)?
VLAN Trunking Protocol (VTP) is a Cisco proprietary Layer 2 messaging protocol that manages the addition, deletion, and renaming of VLANs for the Cisco Catalyst Switches in the same VLAN Trunking Protocol (VTP) domain. VLAN Trunking Protocol (VTP) enables Cisco Catalyst Switches to exchange and maintain consistent VLAN information amongst a group of Cisco Catalyst Switches.
For example, information for the VLAN 50 defined in Cisco Catalyst Switch A is propagated via VTP updates to all other Cisco Catalyst Switches (Switches B, C and D) in the same VTP domain, the other Cisco Catalyst Switches B, C and D will all end up adding VLAN 50 in their local VLAN data base. VTP is available on most of the Cisco Catalyst Family products.
The comparable IEEE standard in use by other manufacturers is GVRP.
Dec 27 2008 6:19AM GMT
Posted by: Yasir Irfan
Networking,
Switches,
Cisco,
IEEE,
Switching,
Cisco IOS,
Cisco 2960,
Cisco 2950,
Cisco 6500,
Cisco Tips,
Cisco 3560,
Cisco Learning,
Cisco 3750-E,
Cisco Systems,
Etherchannel,
Cisco 6500 Series Catalyst Switch,
802.3ad,
Etherchannel configuration,
Etherchannel restrictions,
Protocol,
PAGP,
LACP,
Port Aggregation Protocol,
Link Aggregation Control Protocol
Dear Friends, hope everyone is having great holidays, have fun. In my previous post I was focusing on some of the limitations of Etherchannel. Now let’s proceed a step ahead and figure out about the Etherchannel negotiation protocols. Etherchannels can be negotiated between two Cisco Catalyst Switches to provide some dynamic link configuration.
Basically there are two types of protocols are available, which can be used to bundled the automated creation of an Etherchannel in the Cisco Catalyst Switches.
In upcomming post I will try to concentrate on automating the creation of an Etherchannel . Have fun and happy new year 2009.
Dec 15 2008 6:55AM GMT
Posted by: Yasir Irfan
Networking,
Switches,
Cisco,
IEEE,
Switching,
Routing and Switching,
Cisco IOS,
Cisco 6500,
Cisco Tips,
Etherchannel,
Switching Secrets,
802.3ad,
Kalpana,
Layer 2 Etherchannel,
Layer 3 Etherchannel,
Etherchannel configuration,
10 GigaEtherchannel
Dear Friends in this upcoming series of posts I would like to concentrate on Etherchannel , what is Etherchannel? , what rules and restrictions are applied to an Etherchannel and finally I will show you how to configure an Etherchannel in Cisco Switches both layer 2 as well as layer 3.
An Etherchannel combines multiple physical links into a single logical link that provides aggregate bandwidth of 800 MBPS (fast Etherchannel, full duplex) , 8 GBPS (Giga Etherchannel) or 80 Gbps (10 Giga Ethernet) . Ideal for load sharing or link redundancy – can be used by both layer 2 and Layer 3 subsystems and Etherchannel can provide network managers with a reliable, high-speed solution for the campus network backbone. EtherChannel technology was invented by Kalpana in the early 1990s. They were later acquired by Cisco Systems in 1994. In 2000 the IEEE passed 802.3ad which is an open standard version of EtherChannel.
I would like to explain some key points about Etherchannel using graphical diagrams so that it’s easy understand and to remember.
Etherchannel can be configured defined on Ethernet, Fast Ethernet, Giga Ethernet or 10 Giga Ethernet ports.
