WebThe protocols used are 802.1Q or Cisco’s proprietary Inter-Switch Link (ISL). To find out more about these encapsulation protocols check the Trunking Concepts lessons from our Cisco CCNA exam preparation series. Subinterfaces are virtual interfaces associated with a single physical interface. WebJun 15, 2015 · Cisco's original Catalyst switches supported a single trunking protocol: the Cisco Inter-Switch Link (ISL). Because ISL supported only VLANs from 1–1005, early versions of VTP also supported only those VLANs. This means that when using VTP version 1 or 2 (the default), the only supported VLANs would be from this standard range. This …
"show interface link" command - Cisco Community
WebDec 12, 2024 · QinQ tagging was first developed by Cisco Systems, and is sometimes referred to as “Cisco Inter-Switch Link (ISL) Routing”. It is now an industry-standard protocol and is supported by most major network vendors. To implement QinQ tagging, each customer VLAN is given a unique Service Provider Bridge Global Identifier (S-TAG). The … WebJul 29, 2008 · ISL is an Cisco proprietary protocol. Supports up to 1000 Vlans Original frame is encapsulated and a new header is inserted during encapsulation process. A 26 … jobs at vcu south hill va
Cisco Inter-Switch Link - Wikipedia
This document provides the basic information and a summary of the frame fields for Inter-Switch Link (ISL) and IEEE 802.1Q … See more The ISL frame consists of three primary fields: the encapsulation frame (original frame), which is encapsulated by the ISL header, and the FCS … See more The QinQ Support feature adds another layer of IEEE 802.1Q tag (called "metro tag" or "PE-VLAN") to the 802.1Q tagged packets that enter the network. The purpose is to expand the VLAN space by tagging the tagged … See more IEEE 802.1Q uses an internal tagging mechanism which inserts a 4-byte tag field in the original Ethernet frame itself between the Source … See more WebIn this simple Inter-VLAN routing scenario, we will be using a Cisco Catalyst 3550 as our Layer 3 Switch. Step 1: Enable routing capability on the switch. Even though this command is usually enabled, it does not hurt to be certain that it is. Switch (config)#ip routing. Step 2: Take note of the VLANs that must be routed. WebInter-Switch Link (ISL) as previously stated is a Cisco proprietary trunk protocol which encapsulates the entire frame into a 26 byte header and 4 byte Frame Check Sequence (FCS) that prepends and transports the 10 bit VLAN ID across a trunk link to ensure traffic from SW1 VLAN 10 stays in VLAN 10 when arriving at SW2. jobs at vca animal hospital