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Interface configuration for Cat3550 to Cisco828



Appreciate if anyone can suggest a proper interface configuration in Cat3550 when connected to a Cisco828(which is connected to another 828 via a pair of copper cable, something like extended the LAN from Cat3550). Thanks for any responses.


Frequent Contributor
Frequent Contributor

Please advise the detail requirement then we can help. If it is only a layer 2 connection at the 3550. There is no specific configuration required. If you want some features at 3550, please advise.

Hope this helps.

Layer 2 all the way from the end 828<-->828<-->Cat3550(DHCP server sits here). I'm referring to Cat3550 fastethernet interface configuration that connects to 828 and was thinking whether something like below can help:

switchport mode access

spanning-tree portfast disable

speed 10

duplex half

no shut


Modular multiservice high-density access router

  Enable higher levels of application and service integration in enterprise branch offices in a

 Small form factor

 Wide variety of interface support, high-den

 Sity analog and digital, voice, Cisco IOS

 Firewall/IDS and VPN, Fractional and channelized T1/E1, T3/E3, DS3, E3 and OC-3 ATM,

Ethernet, Gigabit Ethernet and DSL.

 Shares WAN interface cards (WICs), Voice Interface Cards (VICs), and Network Module

 Default configuration in cisco router 828

 8 MB On board flash

16MB On board DRAM + 4MB, 8MB or

16MB DIMM module

 Companies who Cisco IOS-based networks who want to add telecommuters

 VARs who are familiar with Cisco IOS software and want to profitably service small office customers

 Ethernet LAN ports and variety of WAN connectivity, i

 ncluding: ISDN BRI, Frame Relay, ADSL, G.SHDSL,

 async dialup.


Hello Morshidi,

Interface configuration for Cat3550 to Cisco828

Please try using the below config commands for the connection from cat3550 to cisco828

Switch (config-if) # switchport trunk encapsulation  dot1q

Switch (config-if) # switchport mode trunk

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