You can create a virtual token ring interface for testing rsrb and dlsw and
IPX in versions 12.x and up I beleive. You can change the mac address but
you cannot however add an IP address to this interface upto 12.1 though. I
have not tested this in 12.2 yet. I wish I can add an IP address.
(config)#int vir
(config)#int virtual-To0
(config-if)#
sh int
2509#sh int virtual-TokenRing 0
Virtual-TokenRing0 is up, line protocol is up
Hardware is Virtual-TokenRing, address is 4000.0000.0007 (bia
4000.0000.0007)
MTU 8136 bytes, BW 16000 Kbit, DLY 5000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation SNAP, loopback not set
ARP type: SNAP, 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 :0/0 (size/max)
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
0 transitions
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