■SVIとは
Switch Virtual Interface (SVI) のこと。
要するにVLANにIPアドレスを付与してL3スイッチとして使えること（だと思う）。
Router#show int vlan 1
Vlan1 is up, line protocol is up
Hardware is EtherSVI, address is 0017.5a2c.0eb0 (bia 0017.5a2c.0eb0)
Description: $ETH-SW-LAUNCH$$INTF-INFO-FE 2$
Internet address is 192.168.0.254/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 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 00:00:04, 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
191181 packets input, 27300871 bytes, 0 no buffer
Received 11227 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
246977 packets output, 142980129 bytes, 0 underruns
0 output errors, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
