Problem: I can ping IP's in Vlan 101 thru 103 (on switch 01) but not 104 thru 106 - trunked from switch 02. ---------------- Switch 01 ---------------- interface Port-channel1 switchport trunk encapsulation dot1q switchport trunk native vlan 10 switchport mode trunk interface FastEthernet0/1 switchport access vlan 101 switchport mode access ! interface FastEthernet0/2 switchport access vlan 101 switchport mode access ! interface FastEthernet0/3 switchport access vlan 101 switchport mode access ! interface FastEthernet0/4 switchport access vlan 101 switchport mode access ! interface FastEthernet0/5 switchport access vlan 102 switchport mode access ! interface FastEthernet0/6 switchport access vlan 102 switchport mode access ! interface FastEthernet0/7 switchport access vlan 102 switchport mode access ! interface FastEthernet0/8 switchport access vlan 102 switchport mode access ! interface FastEthernet0/9 switchport access vlan 103 switchport mode access ! interface FastEthernet0/10 switchport access vlan 103 switchport mode access ! interface FastEthernet0/11 switchport access vlan 103 switchport mode access ! interface FastEthernet0/12 switchport access vlan 103 switchport mode access interface FastEthernet0/23 description *** Trunkport - Switch 01 *** switchport trunk encapsulation dot1q switchport trunk native vlan 10 switchport mode trunk channel-group 1 mode active ! interface FastEthernet0/24 description *** Trunkport - Switch 01 *** switchport trunk encapsulation dot1q switchport trunk native vlan 10 switchport mode trunk channel-group 1 mode active interface Vlan10 ip address 172.16.1.1 255.255.255.248 ! interface Vlan101 ip address 10.0.0.1 255.255.255.0 ! interface Vlan102 ip address 10.0.1.1 255.255.255.0 ! interface Vlan103 ip address 10.0.2.1 255.255.255.0 ! interface Vlan104 ip address 10.0.3.1 255.255.255.0 ! interface Vlan105 ip address 10.0.4.1 255.255.255.0 ! interface Vlan106 ip address 10.0.5.1 255.255.255.0 ---------------- Switch 02 ---------------- interface Port-channel1 switchport trunk encapsulation dot1q switchport trunk native vlan 10 ! interface FastEthernet1/0/1 switchport access vlan 104 switchport mode access ! interface FastEthernet1/0/2 switchport access vlan 104 switchport mode access ! interface FastEthernet1/0/3 switchport access vlan 104 switchport mode access ! interface FastEthernet1/0/4 switchport access vlan 104 switchport mode access ! interface FastEthernet1/0/5 switchport access vlan 105 switchport mode access ! interface FastEthernet1/0/6 switchport access vlan 105 switchport mode access ! interface FastEthernet1/0/7 switchport access vlan 105 switchport mode access ! interface FastEthernet1/0/8 switchport access vlan 105 switchport mode access ! interface FastEthernet1/0/9 switchport access vlan 106 switchport mode access ! interface FastEthernet1/0/10 switchport access vlan 106 switchport mode access ! interface FastEthernet1/0/11 switchport access vlan 106 switchport mode access ! interface FastEthernet1/0/12 switchport access vlan 106 switchport mode access interface FastEthernet1/0/22 switchport trunk encapsulation dot1q switchport trunk native vlan 10 channel-group 1 mode active ! interface FastEthernet1/0/23 switchport trunk encapsulation dot1q switchport trunk native vlan 10 channel-group 1 mode active ! interface FastEthernet1/0/24 switchport trunk encapsulation dot1q switchport trunk native vlan 10 channel-group 1 mode active interface Vlan10 description *** Management *** ip address 172.16.1.2 255.255.255.248 From switch01 I see that .. Switch#sh arp Protocol Address Age (min) Hardware Addr Type Interface Internet 10.0.3.1 - 000f.3489.8900 ARPA Vlan104 Internet 10.0.2.1 - 000f.3489.8900 ARPA Vlan103 Internet 10.0.1.1 - 000f.3489.8900 ARPA Vlan102 Internet 10.0.0.1 - 000f.3489.8900 ARPA Vlan101 Internet 10.0.5.1 - 000f.3489.8900 ARPA Vlan106 Internet 10.0.4.1 - 000f.3489.8900 ARPA Vlan105 Internet 172.16.1.1 - 000f.3489.8900 ARPA Vlan10 Internet 172.16.1.2 32 0014.69fe.68c1 ARPA Vlan10 Switch#ping 10.0.0.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms Switch# Switch#ping 10.0.3.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.3.1, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) Switch#