02-11-2019 08:11 PM - edited 03-08-2019 05:18 PM
Hi All
According to I make two interface VLAN on switch model WS-C2960X-24TS-LL, first Defalt vlan (vlan1) for management and second (vlan100) for guest, both vlan no routing together and this switch is a DHCP server for only vlan100
A point of problem,
IP management (vlan1) in this switch some time ping timeout, and I check in the arp table it is incorrect, please focus in picture you will see some time subnet 172.x.x.x are vlan 100 some time 172.x.x.x are vlan 1 (actually 172.x.x.x are vlan 100 and 10.x.x.x are vlan 1)
Please help, I try to solve this problem in 3 day but I can't
02-11-2019 11:01 PM
Please can you look to the configuration of Interface gi0/1? If this Interface is in Access and Default VLAN is changed from VLAN Id 1 to VLAN Id 100? Compare the settings with Interface gi0/2 by looking with "show running-config".
02-11-2019 11:43 PM - edited 02-13-2019 03:07 AM
Hi Krishan,
Thanks for you respond,
Please can you look to the configuration of Interface gi0/1?
-->> Interface Gi0/1 is in access vlan 1
If this Interface is in Access and Default VLAN is changed from VLAN Id 1 to VLAN Id 100?
--> No can't change from VLAN1 to VLAN100 because this interface connecting to Gateway of vlan 1 (Gateway is Firewall), VLAN100 is guest VLAN and, my design VLAN100 different gateway with VLAN1
Compare the settings with Interface gi0/2 by looking with "show running-config".
-->interface Gi0/1 is same configuration with Gi0/2, I'm attach picture in this post
02-12-2019 03:41 AM
02-13-2019 03:04 AM
Hi Krishan,
Thank you for your point, now I saw a root cause of this problem, because on a firewall connect via Gi0/1 broadcast subnet 172.X.X.X back to switch 2960X, now I'm edit configuration on firewall and ARP table back to normal
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