06-12-2012 02:46 PM - edited 03-07-2019 07:13 AM
I understand the sub-ints on aserial WAN link, usually for frame-relay, but why the sub-ints on the fa? And how is it implemented on the LAN? With a FR switch?
R#sh ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES manual up up
FastEthernet0/0.1 10.111.80.1 YES manual up up
FastEthernet0/0.20 10.114.1.113 YES manual up up
FastEthernet0/1 unassigned YES NVRAM administratively down down
Serial0/0/0 unassigned YES NVRAM up up
Serial0/0/0.20 152.162.251.138 YES NVRAM up up
Loopback0 10.255.111.82 YES NVRAM up up
Solved! Go to Solution.
06-12-2012 03:07 PM
Hello Ron,
Subinterfaces on FastEthernet interfaces are used for VLANs. If you want your router to be a member of multiple VLANs and provide inter-VLAN routing, you need to create these subinterfaces, one for each VLAN the router should be a member of. The IP address of a particular subinterface can then be used by stations in the associated VLAN as their default gateway.
Best regards,
Peter
06-12-2012 03:07 PM
Hello Ron,
Subinterfaces on FastEthernet interfaces are used for VLANs. If you want your router to be a member of multiple VLANs and provide inter-VLAN routing, you need to create these subinterfaces, one for each VLAN the router should be a member of. The IP address of a particular subinterface can then be used by stations in the associated VLAN as their default gateway.
Best regards,
Peter
06-12-2012 03:38 PM
OH!!!
ROAS. It skipped my mind. Thanks Peter.
06-12-2012 03:41 PM
Hi Ron,
You are very much welcome. Thank you for the rating!
Best regards,
Peter
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