Hi
I have two switchs (cat3750) and both them back to cat6500.
one of our client, accidentally link one access port on one machine, and to another access port on another machine.
the access port configuration is:
interface FastEthernet1/0/2
description standard Ports
switchport access vlan 006
switchport mode access
switchport voice vlan 906
switchport port-security maximum 2
switchport port-security
switchport port-security aging time 2
switchport port-security violation restrict
switchport port-security aging type inactivity
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
macro description cisco-phone
spanning-tree portfast
spanning-tree bpduguard enable
service-policy input AUTOQOS-STANDARD-POLICY
And this link cause big multicast storm. and case eigrp routing unstable until the link is removed. I hardly to believe link a cable between two switch on access port will cause such big issue; only thing I know is at same time a multicast application also running in this area. and after I broke the link the application is still running without any problem.
Could I get advice? if there is any possible to make configuration on access ports more secury on this case? Could I get advice, priciply what is possible reason for this case?
Any comments will be appreciated
Thanks in advance
Julxu
