1.명령어

해당 토폴로지 기반으로 stp 설정을 기술한다

1.1 Member vlan 생성

create vlan test tag 10

dot1d | emistp | pvst-plus 3종류의 프로토콜 중 하나로 stp를 구현 할 수 있는데 emistp, pvst-plus 2개는 port들이 tagged 상태여야하고 dot1d는 untagged 상태여야 구성할수있다

1.2 Member vlan 포트설정

configure vlan test add ports 1, 2 tagged

1.3 Carrier vlan 생성

create stpd test-pvst

1.4 Carrier vlan stp protocol 설정

configure stpd test-pvst mode dot1w

Carrier vlan의 stp 현재 프로토콜을 dot1w로 설정

configure stpd test-pvst default-encapsulation

해당 Carrier vlan의 stp 기본 프로토콜을 dot1w로 설정

위 두개명령어는 안써도 상관없다

1.5 Carrier vlan stp protocol 설정 및 Member vlan mapping

configure stpd test-pvst add vlan test ports 1,2 [dot1d | emistp | pvst-plus]

ex) configure stpd test-pvst add vlan test ports 1,2 pvst-plus
pvst+ 프로토콜을 사용할 예정이므로 이런식으로 해주면된다

configure stpd test-pvst tag [member vlan 태그값]

ex) configure stpd test-pvst tag 10
member vlan tag 값이 10이였기때문에 10을 넣어준다

Carrier vlan tag 설정

Error: 802.1Q Tag 20 is not from a member vlan

이런식으로 member vlan 태그가 아닌 임의의 값으로 넣어버리면 이런 에러메세지가 발생한다

enable stpd [stp 도메인 이름] 또는
enable stpd [stp 도메인 이름] auto-bind vlan [추가할 vlan]

ex)
enable stpd test-pvst
enable stpd test-pvst auto-bind vlan test
상황에 맞춰서 설정해주면된다

show stpd 또는
show stpd [Carrier vlan 이름] 또는
show stpd [Carrier vlan 이름] detail

stp 설정 확인

2. 구현 확인

1번스위치

Stpd: test-pvst         Stp: ENABLED            Number of Ports: 2
Rapid Root Failover: Disabled
Operational Mode: 802.1W                        Default Binding Mode: 802.1D
802.1Q Tag: 10
Ports: 1,2
Participating Vlans: test
Auto-bind Vlans: (none)
Bridge Priority            : 32768              Bridge Priority Mode: 802.1t
Operational Bridge Priority: 32768
BridgeID                   : 80:00:50:b8:44:03:06:00
Designated root            : 80:00:50:5a:dc:03:0c:00
RootPathCost: 200000    Root Port     : 1
MaxAge      : 20s       HelloTime     : 2s      ForwardDelay     : 15s
CfgBrMaxAge : 20s       CfgBrHelloTime: 2s      CfgBrForwardDelay: 15s
Topology Change Time           : 35s            Hold time        : 1s
Topology Change Detected       : FALSE          Topology Change  : FALSE
Number of Topology Changes     : 1
Time Since Last Topology Change: 3656s
Topology Change initiated locally on Port 2
Topology Change last received on Port none from none
Backup Root               : Off         Backup Root Activated  : FALSE
Loop Protect Event Window : 180s        Loop Protect Threshold : 3
New Root Trap             : On          Topology Change Trap   : Off
Tx Hold Count             : 6
Participating VLANs:
VLAN                                     Tag    Number of Ports
          Ports  
-------------------------------------------------------------------------------
test                                     10     2     
          1(F),2(F)

2번스위치

Stpd: test-pvst         Stp: ENABLED            Number of Ports: 2
Rapid Root Failover: Disabled
Operational Mode: 802.1W                        Default Binding Mode: 802.1D
802.1Q Tag: 10
Ports: 1,2
Participating Vlans: test
Auto-bind Vlans: (none)
Bridge Priority            : 32768              Bridge Priority Mode: 802.1t
Operational Bridge Priority: 32768
BridgeID                   : 80:00:50:5a:dc:03:0c:00
Designated root            : 80:00:50:5a:dc:03:0c:00
RootPathCost: 0         Root Port     : ----
MaxAge      : 20s       HelloTime     : 2s      ForwardDelay     : 15s
CfgBrMaxAge : 20s       CfgBrHelloTime: 2s      CfgBrForwardDelay: 15s
Topology Change Time           : 35s            Hold time        : 1s
Topology Change Detected       : FALSE          Topology Change  : FALSE
Number of Topology Changes     : 2
Time Since Last Topology Change: 3641s
Topology Change initiated locally on Port 2
Topology Change last received on Port none from none
Backup Root               : Off         Backup Root Activated  : FALSE
Loop Protect Event Window : 180s        Loop Protect Threshold : 3
New Root Trap             : On          Topology Change Trap   : Off
Tx Hold Count             : 6
Participating VLANs:
VLAN                                     Tag    Number of Ports
          Ports  
-------------------------------------------------------------------------------
test                                     10     2     
          1(F),2(F)

3번스위치

Stpd: test-pvst         Stp: ENABLED            Number of Ports: 2
Rapid Root Failover: Disabled
Operational Mode: 802.1W                        Default Binding Mode: 802.1D
802.1Q Tag: 10
Ports: 1,2
Participating Vlans: test
Auto-bind Vlans: (none)
Bridge Priority            : 32768              Bridge Priority Mode: 802.1t
Operational Bridge Priority: 32768
BridgeID                   : 80:00:50:ef:bc:03:64:00
Designated root            : 80:00:50:5a:dc:03:0c:00
RootPathCost: 200000    Root Port     : 2
MaxAge      : 20s       HelloTime     : 2s      ForwardDelay     : 15s
CfgBrMaxAge : 20s       CfgBrHelloTime: 2s      CfgBrForwardDelay: 15s
Topology Change Time           : 35s            Hold time        : 1s
Topology Change Detected       : FALSE          Topology Change  : FALSE
Number of Topology Changes     : 1
Time Since Last Topology Change: 3656s
Topology Change initiated locally on Port 1
Topology Change last received on Port none from none
Backup Root               : Off         Backup Root Activated  : FALSE
Loop Protect Event Window : 180s        Loop Protect Threshold : 3
New Root Trap             : On          Topology Change Trap   : Off
Tx Hold Count             : 6
Participating VLANs:
VLAN                                     Tag    Number of Ports
          Ports  
-------------------------------------------------------------------------------
test                                     10     2     
          1(B),2(F)

기본 맥 주소 값에 따라서 Root Switch가 지정되고 남은 스위치들은 루프방지를 위해 하나의 세그먼트가 Blocking 상태로 된것을 볼수있다