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| 1. catalyst 3550和非cisco设备之间生成树问题 |
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HP : 0 / 21
MP : 3 / 332
EXP : 86%
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新手上路
成员等级: 1
发表总数: 9
金币总数: 29
所属组别: 普通成员
注册日期: 2003/10/14
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Catalyst 3550的两个端口分别和对端交换机相连，4个端口都配置成tagged模式，都属于vlan 30，对端交换机只支持单生成树（CST），而3550工作在PVST模式，问题是：3550的两个端口往外发出的BPDU报文都是带802.1Q tag的，目的地址是01 00 0c cc cc cd，并没有在native vlan里往外发送不带tag的目的MAC是01 80 c2 00 00 00的BPDU报文（和cisco的文档描述不符），用show spann检查，发现只有在vlan 30里有stp的instance，结果是：cisco发给对端的BPDU报文不能被对端交换机解析从而无法正确地进行拓扑收敛。
3550采用的镜像文件是c3550-i5q3l2-tar.121-13.EA1a，是不是这个版本太旧，无法与仅仅支持单生成树的交换机互通？ |
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| 2. Re:catalyst 3550和非cisco设备之间生成树问题 |
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HP : 250 / 1254
MP : 1625 / 21993
EXP : 16%
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迟则生变
成员等级: 51
发表总数: 4877
金币总数: 308
所属组别: 管理员
注册日期: 2003/01/9
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完整配置？ 哪个端口？
没有谁能像一座孤岛/在大海里独踞/每个人都像一块小小的泥土/连接成整个陆地/如果一块泥土被海水冲去/欧洲将缺其一隅/这如同一座山岬/也如同你的朋友和你自己/无论谁死了/都是自己的一部分在死去/因为我包含在人类这个概念里/因此我从不问丧钟为谁而鸣/它为我，也为你
No man is an Island, entire of itself; every man is a piece of the Continent, a part of the main; if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as if a man or of thy friends or of thine own were; any man's death diminishes me, because I am involved in Mankind; And therefore never send to know for whom the bell tolls; It tolls for thee.
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| 3. Re:catalyst 3550和非cisco设备之间生成树问题 |
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HP : 0 / 21
MP : 3 / 332
EXP : 86%
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新手上路
成员等级: 1
发表总数: 9
金币总数: 29
所属组别: 普通成员
注册日期: 2003/10/14
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配置很简单，fa0/1，fa0/2和fa0/3属于vlan 30，trunk模式，实际运行模式也是trunk，native vlan是1，问题是：对端设备不支持PVST，3550为何不在native vlan里向对端发不带tag的BPDU报文（01 80 c2 00 00 00 ）？
Switch#show run
Building configuration...
Current configuration : 1832 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
!
ip subnet-zero
!
spanning-tree mode pvst
spanning-tree extend system-id
!
!
vlan 30
!
!
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 30
switchport mode trunk
no ip address
!
interface FastEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,30
switchport mode trunk
no ip address
!
interface FastEthernet0/3
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,30
switchport mode trunk
no ip address
!
interface FastEthernet0/4
no ip address
!
interface FastEthernet0/5
no ip address
!
interface FastEthernet0/6
no ip address
!
interface FastEthernet0/7
no ip address
!
interface FastEthernet0/8
no ip address
!
interface FastEthernet0/9
no ip address
!
interface FastEthernet0/10
no ip address
!
interface FastEthernet0/11
no ip address
!
interface FastEthernet0/12
no ip address
!
interface FastEthernet0/13
no ip address
!
interface FastEthernet0/14
no ip address
!
interface FastEthernet0/15
no ip address
!
interface FastEthernet0/16
no ip address
!
interface FastEthernet0/17
no ip address
!
interface FastEthernet0/18
no ip address
!
interface FastEthernet0/19
no ip address
!
interface FastEthernet0/20
no ip address
!
interface FastEthernet0/21
no ip address
!
interface FastEthernet0/22
no ip address
!
interface FastEthernet0/23
no ip address
!
interface FastEthernet0/24
no ip address
!
interface GigabitEthernet0/1
no ip address
!
interface GigabitEthernet0/2
no ip address
!
interface Vlan1
no ip address
!
ip classless
ip http server
!
!
!
line con 0
line vty 0 4
login
line vty 5 15
login
!
end |
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| 4. Re:catalyst 3550和非cisco设备之间生成树问题 |
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HP : 250 / 1254
MP : 1625 / 21993
EXP : 16%
|
|
迟则生变
成员等级: 51
发表总数: 4877
金币总数: 308
所属组别: 管理员
注册日期: 2003/01/9
|
端口f0/1没有允许vlan1通过：
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 30
switchport mode trunk
no ip address
!
interface FastEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,30
switchport mode trunk
no ip address
!
没有谁能像一座孤岛/在大海里独踞/每个人都像一块小小的泥土/连接成整个陆地/如果一块泥土被海水冲去/欧洲将缺其一隅/这如同一座山岬/也如同你的朋友和你自己/无论谁死了/都是自己的一部分在死去/因为我包含在人类这个概念里/因此我从不问丧钟为谁而鸣/它为我，也为你
No man is an Island, entire of itself; every man is a piece of the Continent, a part of the main; if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as if a man or of thy friends or of thine own were; any man's death diminishes me, because I am involved in Mankind; And therefore never send to know for whom the bell tolls; It tolls for thee.
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| 5. Re:catalyst 3550和非cisco设备之间生成树问题 |
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HP : 0 / 21
MP : 3 / 332
EXP : 86%
|
|
新手上路
成员等级: 1
发表总数: 9
金币总数: 29
所属组别: 普通成员
注册日期: 2003/10/14
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谢谢麦子！ |
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