Shulou(Shulou.com)06/01 Report--

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Personal understanding, time relationship, the writing is relatively messy, please forgive me.

Topology:

Reminder: after this topology is turned on, please turn it off as soon as you see the effect of the experiment, otherwise the eNSP will crash, and an unexpected situation may occur after the crash. You can turn off eNSP completely and turn on eNSP again if you want to.

[R1] dis stp

Protocol Status: Disabled

Protocol Standard: IEEE 802.1s

Version: 3

CIST Bridge Priority: 32768

MAC address: 5489-98b8-3a86

Max age (s): 20

Forward delay (s): 15

Hello time (s): 2

Max hops: 20

STP spanning tree on the router is turned off by default

Key configurations:

[R1] dis cur

#

Sysname R1

#

Router id 91.1.1.1

#

Vlan batch 123

#

Interface Vlanif123

Ip address 123.1.1.1 255.255.255.0

#

Interface GigabitEthernet0/0/0

Portswitch

Shutdown

Port hybrid pvid vlan 123

Undo port hybrid vlan 1

Port hybrid untagged vlan 123

#

Interface GigabitEthernet0/0/1

Portswitch

Shutdown

Port hybrid pvid vlan 123

Undo port hybrid vlan 1

Port hybrid untagged vlan 123

#

Ospf 10

Area 0.0.0.0

Network 123.1.1.1 0.0.0.0

#

[R2] dis cur

#

Sysname R2

#

Router id 92.2.2.2

#

Vlan batch 123

#

Interface Vlanif123

Ip address 123.1.1.2 255.255.255.0

#

Interface GigabitEthernet0/0/1

Portswitch

Port hybrid pvid vlan 123

Undo port hybrid vlan 1

Port hybrid untagged vlan 123

Here's a tip: if you want to change to the access interface, you will get an error: renew configuration. This is because you want to delete all the relevant hybrid configurations under the interface and configure the interface again.

#

Interface GigabitEthernet0/0/2

Portswitch

Port hybrid pvid vlan 123

Undo port hybrid vlan 1

Port hybrid untagged vlan 123

#

Ospf 10

Area 0.0.0.0

Network 123.1.1.2 0.0.0.0

#

[R3] dis cur

#

Sysname R3

#

Router id 93.3.3.3

#

Vlan batch 123

#

Interface Vlanif123

Ip address 123.1.1.3 255.255.255.0

#

Interface GigabitEthernet0/0/0

Portswitch

Port hybrid pvid vlan 123

Undo port hybrid vlan 1

Port hybrid untagged vlan 123

#

Interface GigabitEthernet0/0/2

Portswitch

Port hybrid pvid vlan 123

Undo port hybrid vlan 1

Port hybrid untagged vlan 123

#

Ospf 10

Area 0.0.0.0

Network 123.1.1.3 0.0.0.0

#

It is recommended to use display ospf error to view the router id confusion results.

This experiment shows that RID also has anti-ring function, because the second layer breaks the restriction that hello has only one hop, and receives its own hello message to report an error, indicating that there is a loop.

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