Options
Should a router need to know VLAN information?
johnifanx98
Member Posts: 329
in CCNA & CCENT
http://www.dell.com/downloads/global/products/pwcnt/en/app_note_38.pdf
As instructed above when using a router to do inter-VLAN routing, we need to configure VLANs on the router as on switches. This does not sound very elegant. If a router needs to know VLAN, then it's not a layer 3 device, rather than a hybrid of L2 & L3...
As instructed above when using a router to do inter-VLAN routing, we need to configure VLANs on the router as on switches. This does not sound very elegant. If a router needs to know VLAN, then it's not a layer 3 device, rather than a hybrid of L2 & L3...
Comments
-
Options
chrisone
Member Posts: 2,278 ■■■■■■■■■□
the VLANs on a router are sub-interfaces. You need IP address on those sub-interfaces to route between VLANs. So that trunk between the router and the switch , passes VLAN information. You need a router to pass traffic between different networks (VLAN Networks). However on a router there is no switchport mode trunk command, that is only on the switch. On the router you make a trunk by creating sub-interfaces on the interface where the switch and router use. The sub-interfaces use a command "encapsulation dot1q <VLAN ID #> where you enter the VLAN ID that sub-interface will respond to.
Hope this helps clear things up.
Also...dont use Dell for network studies
Certs: CISSP, EnCE, OSCP, CRTP, eCTHPv2, eCPPT, eCIR, LFCS, CEH, SPLK-1002, SC-200, SC-300, AZ-900, AZ-500, VHL:Advanced+
2023 Cert Goals: SC-100, eCPTX -
Options
MrXpert
Member Posts: 586 ■■■□□□□□□□
Another name for the above is called "router on a stick". Have a look for the Cisco guide online for this topic if neededI'm an Xpert at nothing apart from remembering useless information that nobody else cares about.