Table of Contents
What are different trunking protocols?
Trunking Protocol Standards. There are two trunking protocols used on modern communication networks: Inter-Switch Link (ISL) from Cisco and the aforementioned nonproprietary IEEE 802.1Q. Of the two, IEEE 802.1Q is the industry standard. Even Cisco switches now use IEEE 802.1Q (dot1q) by default.
Which are the two trunking encapsulation protocols?
There are two trunking protocols: 802.1Q: This is the most common trunking protocol. It’s a standard and supported by many vendors. ISL: This is the Cisco trunking protocol.
Which protocol is used for trunking The VLAN?
VLAN Trunking Protocol (VTP)
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network. To do this, VTP carries VLAN information to all the switches in a VTP domain.
What is ISL and dot 1q?
ISL is cisco proprietary and presently it is supported only by few high end switches only. Dot1Q is an IEEE’s open standard, which be used to create trunk connection between switches of different vendors. In ISL the original ethernet frame is not modified, it is encapsulated between an ISL header and an FCS.
Which is the open standard trunking protocol?
802.1Q is an open Standard, this means that we can enable it on Switches from different vendors, but ISL is Cisco-proprietary, and this means if we want to use, we have to use Cisco equipments.
Which protocols are used to configure trunking on a switch?
802.1Q and ISL are used to configure trunking on a port.
What is difference between trunk and access port?
A trunk port allows you to send all those signals for each switch or router across a single trunk link. In contrast to an access port, a trunk port must use tagging in order to allow signals to get to the correct endpoint. Trunk ports typically offer higher bandwidth and lower latency than access ports.
Is there a trunking protocol for switches?
Yes there is one, it is the Trunking protocol. Trunking means that between SWITCH A and SWITCH B, we will create a trunk, which is an interface that carries multiple VLANs. IEEE 802.1Q: OpenStandard which is suppprted by many switches. CISCO ISL (Inter-Switch Link): Which is an old trunking protocol and Cisco proprietary.
What is VLAN trunk Protocol (VTP)?
Introduction. VLAN Trunk Protocol (VTP) reduces administration in a switched network. When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This reduces the need to configure the same VLAN everywhere. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series
What is dynamic trunking protocol (DTP)?
Dynamic Trunking Protocol is CISCO proprietary protocol used for negotiating a trunk link between two switches as well as the encapsulation type of either 802.1q or ISL (Generally, 802.1q is used because ISL has more overhead than 802.1q). Of course, It is a layer 2 (data link) protocol and is enabled by default.
What are the details of a VTP packet?
Now consider the detail of a VTP packet. The format of the VTP header can vary, based on the type of VTP message. But, all VTP packets contain these fields in the header: The configuration revision number is a 32-bit number that indicates the level of revision for a VTP packet.