INE R&S ATC007 - SVIs, Native Routed Interfaces, Router-on-a-Stick

Layer 3 Routing

Switched Virtual Interfaces (SVI)
– interface Vlan [1-4094]
– VLAN must exist in the database first

Native Routed Interface
– no switchport
– Same as Ethernet interface on a router

Router-on-a-Stick
– Layer 2 Switch trunks traffic to external Layer 3 router
– Legacy version of SVI

Router usually does not support DTP or VTP
– switchport mode trunk
– switchport trunk allowed vlan

Router encapsulated ISL or 802.1q traffic using subinterfaces
– encapsulation [isl| dot1q] [vlan] [native]
Native VLAN must match
– Can be on the main interface or subinterfacewith native keyword

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switchport autostate exclude
http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_58_se/command/reference/cli3.html#wp3553817

site:www.cisco.com routed access layer

High Availability Campus Network Design--Routed Access Layer using EIGRP or OSPF
http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/routed-ex.html

Campus Network for High Availability Design Guide
http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/HA_campus_DG/hacampusdg.html

Design Zone for Campus - Design Guides
http://www.cisco.com/en/US/netsol/ns815/networking_solutions_design_guidances_list.html

Inter-Switch Link and IEEE 802.1Q Frame Format
http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094665.shtml