Why do you need subinterfaces for multiple VLANs?
Why do you need subinterfaces for multiple VLANs?
Because there is one trunk between swich and router so we need sub interfaces for multiple vlans. If you are using a layer 3 switch then you dot need any sub interfaces so then you can create vlan interface with the default gateway. You need to enable ip routing first. Hope this will help. Please rate if this helps. 10-01-2012 01:59 PM
How to use a Routed VLAN interface in Junos?
Starting with Junos OS Release 14.1X53-D10, you can configure a routed VLAN interface (RVI) for a private VLAN (PVLAN) on an EX8200 switch or EX8200 Virtual Chassis. Instead of a router connected to a promiscuous port routing Layer 3 traffic between isolated and community members, you can alternatively use an RVI.
Are there different protocols for routing between VLANs?
Communication Between VLANs. Cisco IOS software provides full-feature routing at Layer 3 and translation at Layer 2 between VLANs. Five different protocols are available for routing between VLANs: All five of these technologies are based on OSI Layer 2 bridge multiplexing mechanisms.
Can a host Ping both a VLAN and a subintface?
Yes 802.1q and vlan ID route the traffic to its relevant vlan. You can use OSPF, when a Host can ping its default gateway because it is on the same local subnet. Host can ping both switches because the management interfaces are set to VLAN1.
Do you need subinterfaces for Layer 2 switch?
Yes you are correct. if you are using layer 2 switch and you want to do intervlan routing then you need layer 3 device like router. But you need to configure sub interfaces with default gateway to route the traffic.
Is the Cisco router connected to the core switch?
Intervlan routing is configured and working fine. Now the trouble start when users from FINANCE and HR are trying to access our remote office networks. The router (Cisco 4331) is connected to Core switch with its LAN port ip as X.X.1.1/24.
Do you need a router for intervlan routing?
If you want intervlan routing you need a router. You then setup a trunking port between the switch and router (ISL, 802.1Q). Now in the router you can create VLANS and here you inter the ip addresses of the subnet or default gateway correct?
