This post maybe could go to switching, but as the problem is a C1111 router I figure to post it here. I have 2x of these routers at 2 different locations that connect via a fiber network. I am told the switch connecting is "untagged". I have 3 vlans configured, 2 of which I really need to use to communicate. The primary is a default "VLAN 1", the other vlan 100.
In testing I had these routers + some other devices & routers all connected through some basic Netgear 5 port switches, all was good. Now they are remote, all is not good. One of the physical ports was configured as:
interface GigabitEthernet0/1/0
switchport trunk allowed vlan 1-102
switchport mode trunk
The other port is:
interface GigabitEthernet0/1/1
switchport mode access
The VLAN config is pretty basic:
interface Vlan1
ip address 10.5.5.2 255.255.255.240
ip nat inside
!
interface Vlan100
ip address 10.5.6.2 255.255.255.248
I had found some other threads online referencing a 8P model that had "untagged" added to the VLAN configuration, but my options are more limited. Nevertheless I am at a loss to think what I can test next.
The last thing I did was had port 1 with vlan 1 connected directly to a FPR1010 ASA on it's switchport (vlan1) and that too just would not get a ping response. I did have the C1111-4Ps switchport/vlan connected directly to an old router with (Cisco 1721 w/4 port switch). That worked just fine. I am afraid I am either missing something, ignorant of something else, or ??. I did reach out to the other end but am afraid it will come back with "our switch is untagged" response only. Don't know what I can see or do to test further the communication problems.
p.s. I did temporarily test using Gigabit 0/0/1 connected and that of course worked, so this isn't cabling issue but a config issue on my end.
