11-08-2005 06:28 AM - edited 03-03-2019 10:55 AM
Hello Netpro,
I discovered an interface called "NVI0" on an 2610xm running with IOS "c2600-spservicesk9-mz.123-14.T3.bin"
I wasn't able to find any documentation about this interface type, does anyone know what this interface is about?
It doesn't show up in the running config, I can't delet it, I can't clear it...
It is just visible with "show ip interface brief" and "show interface"
NVI0 is up, line protocol is up
Hardware is NVI
MTU 1514 bytes, BW 10000000 Kbit, DLY 0 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation UNKNOWN, loopback not set
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
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Regards, Dirk.
Solved! Go to Solution.
11-08-2005 06:54 AM
Dirk
A quick look at the documentation reveals that the NVI is the NAT Virtual Interface which was apparently introduced in 12.3(14)T. With this new feature you no longer need to configure NAT inside interface(s) and NAT outside interface(s). So yes you would not be able to delete it, since it is defaulted into existance by this version of IOS.
This link will provide more information about this new feature:
http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a008041d91a.html
HTH
Rick
11-08-2005 06:54 AM
Dirk
A quick look at the documentation reveals that the NVI is the NAT Virtual Interface which was apparently introduced in 12.3(14)T. With this new feature you no longer need to configure NAT inside interface(s) and NAT outside interface(s). So yes you would not be able to delete it, since it is defaulted into existance by this version of IOS.
This link will provide more information about this new feature:
http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a008041d91a.html
HTH
Rick
11-08-2005 07:06 AM
Hello Rick,
I was just searching for "NVI0" and couldn't find anything. Thanks for your help!
I will then allow NVI0 to make itself at home on my routers. :-)
Regards, Dirk.
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