Cisco Catalyst 3750-X Series

[packettracer84]

Hi,

I want to create small network as attachment below using Cisco Catalyst 3750-X Series :

Device 1 have 2 LAN Interface

Interface 1 to Catalyst LAN A (10.80.3.235/28)

Interface 2 to Catalyst LAN B (10.80.3.245/28)

Device 2 have 2 LAN Interface

Interface 1 to Catalyst LAN A (10.80.3.236/28)

Interface 2 to Catalyst LAN B (10.80.3.246/28)

Device 3 have 2 LAN Interface

Interface 1 to Catalyst LAN A (10.80.3.237/28)

Interface 2 to Catalyst LAN B (10.80.3.247/28)

I have try to connect as above using VLAN 1 standard in each catalyst for all ports, but Device 1,2,3 always intermittent alarm. If i use unmanageble switch Device 1,2,3 running well.

Would somebody help me to advise what i should do ?

Thanks for your help

[Vasilii Mikhailovskii]

Hello.

I guess you need to clarify what the alarm (error) you see on the switch (check log).

Could you also clarify why do you need such strange interconnection; do your devices aware of LACP?

PS: all your 3750Xs could be joined into stack and will become like a single managed L3 switch that is much easier to configure and support, then 3 different devices!

[packettracer84]

Hello Mikhail,

I was check log at both 3750-x as follow :

Switch#sh log

Syslog logging: enabled (0 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)

No Active Message Discriminator.

No Inactive Message Discriminator.

    Console logging: level debugging, 37 messages logged, xml disabled,

                     filtering disabled

    Monitor logging: level debugging, 0 messages logged, xml disabled,

                     filtering disabled

    Buffer logging:  level debugging, 37 messages logged, xml disabled,

                     filtering disabled

    Exception Logging: size (4096 bytes)

    Count and timestamp logging messages: enabled

    File logging: disabled

    Persistent logging: disabled

No active filter modules.

    Trap logging: level informational, 40 message lines logged

Log Buffer (4096 bytes):

Switch#

There isn't alarm log on Cisco, but our device intermittent still occur.

We want to make redundancy LAN, at previously we always use unmanageble switch with same network topology as above. Our device not aware LACP. Here, i attach our device configuration setup.

Thanks

[Vasilii Mikhailovskii]

Hello.

I guess you would better ask your vendor (of the devices) for support, as nobody knows how it works.