10-20-2008 10:52 AM - edited 03-06-2019 02:02 AM
i am relatively new,so i would like to know how to enable trunking from 3825 router to 3560 switch.
If i am missing any details please let me know.
10-20-2008 11:35 AM
Hello,
You can create subinterfaces(corresponding to each vlan) on the router's fastethernet port and configure the port (on the switch) attached to this router as trunk port.
Router
---------
int fas 0/0
speed 100
duplex full
int fas 0/0.10
descr VLAN 10 interface
encap dot1q 10
ip address 192.168.10.1 255.255.255.0
int fas 0/0.20
descr VLAN 20 interface
encap dot1q 20
ip address 192.168.20.1 255.255.255.0
int fas 0/0.30
descr VLAN 30 interface
encap dot1q 30
ip address 192.168.30.1 255.255.255.0
On Switch
------------
int fas 0/1
description Connected to Cisco 3845 fas0/0
switchport mode trunk
switchport trunk encap dot1q
HTH
Saju
Pls rate helpful posts
10-20-2008 11:40 AM
Hello Ravishankar,
the trunk is configured on the switch side
on the router side for each Vlan where the router has to be member of you configure a vlan subif.
the same trunking method 802.1Q or ISL must be used on both sides
if using 802.1Q the native vlan (=untagged) must match default is vlan 1 on both.
for the switch side use:
for the router side:
int f0/0
no ip address
int f0/0.10
enc dot1q 10
ip addr 192.168.10.1 255.255.255.0
int f0/0.20
enc dot1q 20
ip addr 192.168.20.1 255.255.255.0
Hope to help
Giuseppe
10-21-2008 05:46 AM
thanks for your quick response and it was very elaborative.
Here is the deal,these two devices(3825 and 3560(24port) are new devices and i have to configure them so they are good to be used for voip.
what are the basic configurations i need on them.
If you can give me step by step,that would be really nice of you.
I have to add a default route on 3825 which would be the ip address of a wan router.
And how would i enable dhcp on both the devices.
Like i mentioned,i am totally new to devices and your help would help me understand at this learning stage.
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