Interconnecting cisco switches with non-cisco switches

[nmunjita]

I need help concerning interconnecting two Cisco switches (3550’s) using a non-Cisco switch or hub on the LAN. I have noticed that the two Cisco switches connected using a non-Cisco switch are able to communicate well, however a PC connected to the non-Cisco switch/hub can not ping any device on the LAN. The non-Cisco device is a working one. When the two Cisco switches are connected using a Cisco switch, PCs connected to the interconnecting switch are able to ping. What’s the explanation? Please help.

[Georg Pauwen]

Hello,

what brand/model is the non-Cisco switch ? The problem could be related to either the way the 3550 switches are configured, or, depending on the type of non-Cisco switch, VLAN propagation is handled. Can you post the configuration of one of the 3550 switches, and, if possible, that of the non-Cisco switch ?

Regards,

GP

[nmunjita]

Building configuration...

Current configuration : 3342 bytes

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! No configuration change since last restart

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version 12.1

no service pad

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

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clock timezone GMT -2

ip subnet-zero

ip rcmd rcp-enable

ip rcmd remote-username cwuser

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spanning-tree mode pvst

spanning-tree extend system-id

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interface FastEthernet0/1

switchport mode dynamic desirable

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interface FastEthernet0/2

switchport mode dynamic desirable

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interface FastEthernet0/3

switchport mode dynamic desirable

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interface FastEthernet0/4

switchport mode dynamic desirable

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interface FastEthernet0/5

switchport mode dynamic desirable

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interface FastEthernet0/6

switchport mode dynamic desirable

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interface FastEthernet0/7

switchport mode dynamic desirable

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interface FastEthernet0/8

switchport mode dynamic desirable

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interface FastEthernet0/9

switchport mode dynamic desirable

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interface FastEthernet0/10

switchport mode dynamic desirable

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interface FastEthernet0/11

switchport mode dynamic desirable

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interface FastEthernet0/12

switchport mode dynamic desirable

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interface FastEthernet0/13

switchport mode dynamic desirable

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interface FastEthernet0/14

switchport mode dynamic desirable

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interface FastEthernet0/15

switchport mode dynamic desirable

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interface FastEthernet0/16

switchport mode dynamic desirable

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interface FastEthernet0/17

switchport mode dynamic desirable

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interface FastEthernet0/18

switchport mode dynamic desirable

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interface FastEthernet0/19

switchport mode dynamic desirable

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interface FastEthernet0/20

switchport mode dynamic desirable

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interface FastEthernet0/21

switchport mode dynamic desirable

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interface FastEthernet0/22

switchport mode dynamic desirable

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interface FastEthernet0/23

switchport mode dynamic desirable

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interface FastEthernet0/24

switchport mode dynamic desirable

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interface GigabitEthernet0/1

switchport mode dynamic desirable

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interface GigabitEthernet0/2

switchport mode dynamic desirable

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interface Vlan1

ip address

ip default-gateway

ip classless

ip http server

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snmp-server community

snmp-server community

snmp-server location

snmp-server system-shutdown

snmp-server enable traps snmp authentication warmstart linkdown linkup coldstart

snmp-server enable traps config

snmp-server enable traps entity

snmp-server enable traps flash insertion removal

snmp-server enable traps bridge

snmp-server enable traps stpx

snmp-server enable traps rtr

snmp-server enable traps port-security

snmp-server enable traps vtp

snmp-server enable traps vlancreate

snmp-server enable traps vlandelete

snmp-server enable traps envmon fan shutdown supply temperature status

snmp-server enable traps MAC-Notification

snmp-server enable traps hsrp

snmp-server enable traps cluster

snmp-server enable traps copy-config

snmp-server enable traps syslog

snmp-server enable traps vlan-membership

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line con 0

line vty 0 4

login

line vty 5 15

login

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ntp clock-period 17180064

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end

[gabriel.gearip]

Hi,

Have you tried setting 'switchport mode access' on the ports connected with the non-Cisco equipment?