There are two vlans configured on my switch named Vlan 2 and Vlan 3. I have configured port Gi0/8 on switch as trunk port. On router I have configured two subinterfaces which are Gi0/0.1 and Gi0/0.2 for Vlan 2 and Vlan 3 respectively. And routers Gi0/0 is connected to switch port Gi0/8.
a) Network 172.16.0.0/255.255.255.252.0 (Vlan 3) is configured on On Gi0/0.2
b) Network 192.168.40.0/255.255.255.255.0 (Vlan 2) is configured on On Gi0/0.1
Whenever I shutdown the subinterface Gi0/0.1 through EEM, all the traffic of network 172.16.0.0 also goes down. Users of network 172.16.0.0 can't even ping other ports of router and complete traffic is blocked. Above that if I change anything on this subinterface everything of other network is blocked. Router configuration is given below
! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption no service dhcp ! hostname Router ! boot-start-marker boot-end-marker ! ip cef ! interface GigabitEthernet0/0 no ip address duplex auto speed auto ! interface GigabitEthernet0/0.1 encapsulation dot1Q 2 ip address 192.168.20.4 255.255.255.0 ip nat inside ip virtual-reassembly ! interface GigabitEthernet0/0.2 encapsulation dot1Q 3 ip address 172.16.0.10 255.255.252.0 ip nat inside ip virtual-reassembly ! interface GigabitEthernet0/1 ip address 192.168.0.16 255.255.255.0 ip nat outside ip virtual-reassembly duplex auto speed auto ! interface GigabitEthernet0/1.1 ! interface Serial0/0/0 no ip address shutdown ! ip route 0.0.0.0 0.0.0.0 192.168.0.1 ! ! no ip http server no ip http secure-server ip nat pool VLAN 192.168.0.5 192.168.0.5 netmask 255.255.255.0 ip nat inside source list 1 pool VLAN overload ip nat inside source list 2 pool VLAN overload ! access-list 1 permit 192.168.20.0 0.0.0.255 access-list 2 permit 172.16.0.0 0.0.255.255 ! ! control-plane scheduler allocate 20000 1000 ! event manager session cli username Router event manager applet shutdown-port event timer cron cron-entry "30 7 * * *" action 010 cli command "enable" action 020 cli command "config t" action 030 cli command "interface Gi0/0.1" action 040 cli command "shutdown" action 050 cli command "end" action 060 syslog msg "Interface Gi0/0.1 down now" event manager applet noshut-port event timer cron cron-entry "0 15 * * *" action 010 cli command "enable" action 020 cli command "config t" action 030 cli command "interface Gi0/0.1" action 040 cli command "no shutdown" action 050 cli command "end" action 060 syslog msg "Interface Gi0/0.1 is up now" !
