网桥ID中的MAC地址取自哪里？
请问交换机中网桥ID中的MAC地址是取自哪个接口的？？谢谢~ 交换机的接口是没有MAC的，一个交换机只有一个MAC地址，网桥ID=优先级+MAC 交换机的MAC地址池吧 一个交换机只有一个MAC地址？？不会吧··我知道是有个MAC地址池的啊~所以肯定不止一个吧 本帖最后由 zhang5968 于 2009-8-25 10:42 编辑
一下为同一台交换机的信息，很清楚了。。。
VLAN0003
Spanning tree enabled protocol ieee
Root ID Priority 4099
Address 000C.CF27.E0A1
This bridge is the root
Hello Time2 secMax Age 20 secForward Delay 15 sec
Bridge IDPriority 4099(priority 4096 sys-id-ext 3)
Address 000C.CF27.E0A1
Hello Time2 secMax Age 20 secForward Delay 15 sec
Aging Time20
Switch#show interfaces vlan 1
Vlan1 is administratively down, line protocol is down
Hardware is CPU Interface, address is 000c.cf27.e0a1 (bia 000c.cf27.e0a1)
MTU 1500 bytes, BW 100000 Kbit, DLY 1000000 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 21:40:21, output never, output hang never
Last clearing of "show interface" **ers never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
额。。。
在运行生成树的时候采用的网桥的MAC地址是交换机的Base MAC地址：在特权配置模式下：show version可以看见。sw1#sh version
Cisco IOS Software, C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(25)SEE2, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Fri 28-Jul-06 12:20 by yenanh
Image text-base: 0x00003000, data-base: 0x00DC0AC4
ROM: Bootstrap program is C3550 boot loader
sw1 uptime is 5 days, 19 minutes
System returned to ROM by power-on
System image file is "flash:/c3550-ipservicesk9-mz.122-25.SEE2.bin"
This product contains cryptographic features and is subject to United
Sta
5d00h: %SYS-5-CONFIG_I: Configured ** console by consoletes and local **ry laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local **ry laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Cisco WS-C3550-24 (PowerPC) processor (revision D0) with 65526K/8192K bytes of memory.
Processor board ID CAT0628Y12V
Last reset ** warm-reset
Running Layer2/3 Switching Image
Ethernet-controller 1 has 12 Fast Ethernet/IEEE 802.3 interfaces
Ethernet-controller 2 has 12 Fast Ethernet/IEEE 802.3 interfaces
Ethernet-controller 3 has 1 Gigabit Ethernet/IEEE 802.3 interface
Ethernet-controller 4 has 1 Gigabit Ethernet/IEEE 802.3 interface
24 FastEthernet interfaces
2 Gigabit Ethernet interfaces
The password-recovery mechanism is disabled.
384K bytes of flash-simulated NVRAM.
Base ethernet MAC Address: 00:0A:8A:07:82:80
Motherboard assembly number: 73-5700-08
Power supply part number: 34-0966-02
Motherboard serial number: CAT06270F5F
Power supply serial number: DAB06230DTN
Model revision number: D0
Motherboard revision number: C0
Model number: WS-C3550-24-EMI
System serial number: CAT0628Y12V
Configuration register is 0x10F
采用红色标识的就是了！！ 被JEFF抢去说了。 本帖最后由 zhang5968 于 2009-8-25 14:46 编辑
想请教下JEFF大哥，--
64K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 0090.2BA5.DA91
Motherboard assembly number : 73-9832-06
Power supply part number : 341-0097-02
Motherboard serial number : FOC103248MJ
Power supply serial number : DCA102133JA
Model revision number : B0
Motherboard revision number : C0
Switch#show interfaces vlan 1
Vlan1 is administratively down, line protocol is down
Hardware is CPU Interface, address is 0090.2ba5.da91 (bia 0090.2ba5.da91)
MTU 1500 bytes, BW 100000 Kbit, DLY 1000000 usec,
reliability 255/255, txload 1/255, rxload 1/255 再请教下各大哥~既然交换机端口不需要MAC地址···而交换机也只用那么一个MAC地址
即使运行PVST，使用扩展ID，也只是用到一个MAC地址就行
那么交换机MAC地址池里的那么多个MAC地址还有什么用？？ 想下交换机的功能？ 二层的。是做什么用的？
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