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Spanning Tree does not work as I expected

netSys.py
Community Member

Hello all,

I have this topology:

netSyspy_0-1671522692566.png

  • Movistar and Vodaphone routers use the HSRP protocol to set up the VIP 192.168.1.254.
  • All PCS is set up with the gateway 192.168.1.254
  • The server does set up 192.168.2.1 as the gateway interface

I have this output for each switch:

netSyspy_1-1671522924678.png

The question is:

  • Why the interface Fa0/1 of the switch S1 is blocked?
  • why cannot I get a ping reply from the server to any PC?

The router and switch password are: example

 

 

8 Replies 8

netSys.py
Community Member
 

  • Why the interface Fa0/1 of the switch S1 is blocked? Because you have triangle (three SW) then STP must BLK one port to prevent L2 Loop
  • why cannot I get a ping reply from the server to any PC? you must config VIP of HSRP as GW IP in each host  

  • Because you have triangle (three SW) then STP must BLK one port to prevent L2 Loop --> But I've seen in other examples that does have this all ports as green. Why I dont' have all green ports?
  • why cannot I get a ping reply from the server to any PC? you must config VIP of HSRP as GW IP in each host . -> I made it....

    Did you try my .pkt?

you run RSTP and I think other example run PVST or MST which make VLAN BLK not all link (trunk)

which PKT version you use I try open it but could not !!

8.2.0.0162

I open it, I dont see the HSRP config ? I think you config it and missing wr config.

I've uploaded the router set up in this new file.

all your config is OK except 
you dont run any routing between the three routers 
so add 
router ospf 100
net 10.1.1.0 0.0.0.255 area 0
net 192.168.1.0 0.0.0.255 area 0
!
router ospf 100
net 10.1.1.0 0.0.0.255 area 0
net 192.168.2.0 0.0.0.255 area 0
net 10.2.2.0 0.0.0.255 area 0
!
router ospf 100
net 10.2.2.0 0.0.0.255 area 0
net 192.168.1.0 0.0.0.255 area 0

that it.