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How to plug in a Cisco 3620 into a 6509

I have a Cisco 3620 series router.  It has one fastethernet interface and multiple serial interfaces (according to a show int description).  I need another interface that I can plug into a 6509 to run another vlan over it.  Being that the fast ethernet interface is in use, is there anyway to take a serial interface, and (though config or adapter) convert it into an interface that can be plugged into a 6509 (RJ45).
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Elemental12
Asked:
Elemental12
2 Solutions
 
GuruChiuCommented:
The most common way I do is VLAN trunk the link between your 3620 and 6509. This is an example:

router side:
interface GigabitEthernet0/0
 ip address xx.xx.90.50 255.255.255.0
 
interface GigabitEthernet0/0.119
 encapsulation dot1Q 119
 ip address 172.27.72.162 255.255.255.0

switch side:
interface vlan 1
 ip address xx.xx.90.49 255.255.255.0
interface vlan 119
ip address 172.27.72.1 255.255.255.0
interface g0/1
desc connect to router
 switchport trunk encapsulation dot1q
 switchport mode trunk
switchport trunk native vlan 1


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Don JohnstonCommented:
is there anyway to take a serial interface, and (though config or adapter) convert it into an interface that can be plugged into a 6509 (RJ45).

No.

Short of trunking your existing FE interface, the only other way is to install an NM-1FE module in an available slot. If you don't have an available slot (If you've got an available slot, that is.)
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