This is a lab setup. Fundamentally, I'm dealing with two switches and a router. From the bottom to the top of the topology:
I have a trunk coming into a switch. This trunk carries traffic from multiple VMs, each assigned a VLAN. From this switch, I separate the incoming vlans through access ports to yet another switch. At this switch, there's a trunk heading to a router.
If I try to ping from VM to router, I only have connectivity through a single VLAN. If I disable interfaces, networking works for each VLAN separately.
Does this suggest some sort of loop?
My target is to guarantee that traffic is flowing only through certain access ports between the switches. By the way, if I trunk everything across the topology, everything works fine.
(edit to include image)
ok heres my config file... I was able to successfull ping between two switches using only access port on totally different vlans (vlan 10 and vlan 20)
Sorry about the wrapped text... dont know how to make it show line by line on this site.
Switch1
Switch#show running-config
Building configuration...
Current configuration : 1847 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
spanning-tree mode pvst
!
interface FastEthernet0/1
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/2
switchport access vlan 10
!
interface FastEthernet0/3
switchport access vlan 10
!
interface FastEthernet0/4
switchport access vlan 10
!
interface FastEthernet0/5
switchport access vlan 10
!
interface FastEthernet0/6
switchport access vlan 10
!
interface FastEthernet0/7
switchport access vlan 10
!
interface FastEthernet0/8
switchport access vlan 10
!
interface FastEthernet0/9
switchport access vlan 10
!
interface FastEthernet0/10
switchport access vlan 10
!
interface FastEthernet0/11
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/12
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/13
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/14
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/15
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/16
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/17
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/18
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/19
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/20
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
!
!
!
line con 0
!
line vty 0 4
login
line vty 5 15
login
!
!
end
Switch#
heres Switch 2
Switch#show running-config
Building configuration...
Current configuration : 2097 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
spanning-tree mode pvst
!
interface FastEthernet0/1
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/2
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/3
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/4
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/5
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/6
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/7
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/8
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/9
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/10
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/11
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/12
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/13
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/14
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/15
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/16
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/17
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/18
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/19
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/20
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address shutdown
!
interface Vlan10
no ip address
!
!
!
!
line con 0
!
line vty 0 4
login
line vty 5 15
login
!
!
end
Switch#