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vlan1 is in up/down state - can't ping


I have a customer with a 4507r, - 12.1.(14)E, dual Sup IVs.

With VLAN 1 interface configured with an IP address and no shut, the int shows as up/down until you put a device in an unconfigured port, (i.e. on VLAN1) meaning you cant ping int VLAN1 without a device attached.

Also, when you remove the device, the int goes back to up/down, again unable to ping it.

By keeping VLAN1 as his management VLAN, when the switch is fully configured he intended not to have any ports in VLAN 1 at all.

Obviously he doesn't want to have a device permanently attached to an unconfigured port. I can't see that this is by default - any suggestions?

interface Vlan1

description 'Management VLAN - 94.x'

ip address

sh int

Vlan1 is up, line protocol is down

Hardware is Ethernet SVI, address is 000c.8523.6cbf (bia 000c.8523.6cbf)

Description: 'Management VLAN - 94.x'

Internet address is

MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

ARP type: ARPA, ARP Timeout 04:00:00

Last input never, output never, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes

L3 out Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts (0 IP multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 packets output, 0 bytes, 0 underruns

0 output errors, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

Thanks in advance



Re: vlan1 is in up/down state - can't ping

He's going to need to route to it. Configure it in the router. It becomes active when it is included in a trunk.

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