O'Reilly logo

Cisco LAN Switching Fundamentals by Basir Sakandar - CCIE No. 6040, David Barnes - CCIE No. 6563

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Why MLS?

The first Cisco switches did not have any Layer 3 routing capability. They merely switched frames at Layer 2 between hosts on the same VLAN. All inter-VLAN switching was forwarded to the router. The switch was many times faster in switching packets than the router. A router had greater latency when it had to forward packets at Layer 3. To get around this problem, as mentioned in earlier chapters, VLANs were extended throughout the LAN campus, minimizing the role of routers in the LAN network.

The actual connection between the switch and the router came in two forms. The first was one physical link per VLAN that was configured on the switch. The second method involved one physical cable between the switch and router with trunking enabled. ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required