Integration with 3com and RF LINK

Answered Question
Nov 25th, 2008
User Badges:
  • Bronze, 100 points or more

Hi,


I have a problem with this topology.


I have a RF link connected with cisco to 3com and a optic fiver to other cisco to the first cisco like the figure.


The problem is when the RF and Fiber optic is available because generate a loop.


The pvstp dont detect the loop and i want to be connected two channels in case the fiber go down.


someone can give and advice.?


the 3com only suport stp o rstp and the cisco switchs are configurated with pvstp but pvstp it can't be modified.


thanks.



Attachment: 
Correct Answer by Giuseppe Larosa about 8 years 6 months ago

Hello Arturo,

make the RF link and the 3com - switch A links 802.1Q trunks in this way PSTP+ should able to detect the presence of switchA via the RF link.

over an 802.1Q trunk PVST+ BPDUs are tunneled over a proprietary multicast MAC address and should flow via the 3com.


increase the stp cost for all vlans on the link of switchA to 3com so that this becomes a backup link


You can do this if you can configure the 3COM device.



Hope to help

Giuseppe


  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
Loading.
Correct Answer
Giuseppe Larosa Wed, 11/26/2008 - 10:26
User Badges:
  • Super Silver, 17500 points or more
  • Hall of Fame,

    Founding Member

Hello Arturo,

make the RF link and the 3com - switch A links 802.1Q trunks in this way PSTP+ should able to detect the presence of switchA via the RF link.

over an 802.1Q trunk PVST+ BPDUs are tunneled over a proprietary multicast MAC address and should flow via the 3com.


increase the stp cost for all vlans on the link of switchA to 3com so that this becomes a backup link


You can do this if you can configure the 3COM device.



Hope to help

Giuseppe


Actions

This Discussion