We are attempting to configure a couple uplink ports on our C3750X to run in a port channel over to a Dell switch that we have.
About our switches:
2 Stacked C3750X's with 48 gig ports and a 4 port SFP+ module
Show ver:
4 Virtual Ethernet interfaces
1 FastEthernet interface
104 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
Currently, we have two uplinks running in a port channel on each switch that go to a core switch on our network. This port channel works fine. I have some confusion regarding the following:
When I do a show run to check the interface configs on each switch, I'm seeing our 48 gig ports, the 4 ports from our module, and then two ten gig ports. This goes for each switch. I'm not sure where these ten gig interfaces are coming from. As you'll see below, there isn't any configuration on the 4 ports in the module themselves, instead the configuration is on the two 10 gig interfaces. When I check the port channeling, it is showing the ten gig interfaces from each switch in the port channel. When I do a show ip int brief it shows the 4 ports on module as being down, but the ten gig interfaces as being up. If I remove one of the cables in the module, one of the ten gig interfaces go down, so I know the ports in the module are showing as the ten gig interfaces. If that is the case, why do I see the 4 gig interfaces from the module, AND the two ten gig interfaces on each switch. Shouldn't it be showing 4 ten gig interfaces and not two ten gigs and the 4 gig ports?
show ip int brief
GigabitEthernet1/1/1 unassigned YES unset down down
GigabitEthernet1/1/2 unassigned YES unset down down
GigabitEthernet1/1/3 unassigned YES unset down down
GigabitEthernet1/1/4 unassigned YES unset down down
Te1/1/1 unassigned YES unset up up
Te1/1/2 unassigned YES unset up up
show run
interface GigabitEthernet1/1/1
!
interface GigabitEthernet1/1/2
!
interface GigabitEthernet1/1/3
!
interface GigabitEthernet1/1/4
!
interface TenGigabitEthernet1/1/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport mode trunk
switchport nonegotiate
mls qos trust dscp
channel-group 10 mode active
!
interface TenGigabitEthernet1/1/2
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport mode trunk
switchport nonegotiate
mls qos trust dscp
channel-group 10 mode active
From above: Te1/1/1 is actually GigabitEthernet1/1/2, as when I uplug the cable from GigabitEthernet1/1/2, Te1/1/1 goes down. I haven't seen this before where the GigabitEthernet1/1/2 interface is actually Te1/1/1?
show etherchannel summary
10 Po10(SU) LACP Te1/1/1(P) Te1/1/2(P) Te2/1/1(P)
Te2/1/2(P)
I'm trying to configure a different port channel (Po30) to use GigabitEthernet1/1/1 and GigabitEthernet1/1/3, but when I configure the port channel and do a show etherchannel 30 detail, it shows the number of ports as 0. When I plug an uplink into GigabitEthernet1/1/1 or GigabitEthernet1/1/3, there are no link lights. BUT if I uplug the existing cables from GigabitEthernet1/1/2 or GigabitEthernet1/1/4, GigabitEthernet1/1/1 or GigabitEthernet1/1/3 will then get link lights.
Altogether I'm just not sure what is happening with these ten gig interfaces actually being one of the 4 gig interfaces.
I can provide more information if necessary
Thanks!
