03-27-2008 12:50 PM
Hi,
I'm at a customer site whose Cisco 2811 routers with IOS 12.4(15)T1 return an ifType of ethernetCsmacd(6)for vlans. Am I correct that this is wrong and the ifType should be l2vlan(135)or l3ipvlan(136)?
thanks
Bob
03-27-2008 01:19 PM
If the encapsulation on the VLAN interfaces is ARPA, then the ifType will be ethernetCsmacd(6) for this device in this version of IOS.
03-27-2008 02:16 PM
Hi,
We have vlan4 configured thusly;
interface Vlan4
description DCN LAN
bandwidth 10000
ip address 10.110.26.1 255.255.255.0
ip access-group NCM_Network_In in
no ip mroute-cache
fair-queue
service-policy output NCM_In
!
We also have
interface FastEthernet0/0
description Central Switch Gi0/1
no ip address
no ip mroute-cache
duplex full
speed 100
no cdp enable
service-policy output Theatre_In
!
The vlan4 interface has the same MAC Address as FastEthernet0/0 and both are ifType=6. We are using Smarts Availability Manager for fault managment and it is not able to build topology (connections between switches) properly. According to Smarts this is because two physical interfaces (identified by ifType = 6) have the same MAC address.
Does ifType 6 mean a physical address and therefore the vlan should not be a type 6?
thanks
Bob
03-27-2008 02:20 PM
I don't see how you're tying VLAN 4 to interface Fa0/0. It would be helpful to see the entire config from this device as well as a show ver. It looks like you are configuring a switch and not a 2811 router. Is this an etherswitch module in the 2811?
03-27-2008 02:23 PM
That's the problem, vlan4 is NOT associated with Fa0/0. If you give me your email address I can send you the config.
thnaks
Bob
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