08-05-2019 12:59 PM
Hi Friends,
i have cisco i5000 working as L3 intervlan routing at core layer and on distribution layer i have Hirschman switches. The problem is that, on distribution hirschman switches running MRP with access switches and RSTP with I5000. So i am receiving port flapping on cisco switch and and only vlan 1 selecting root as hirschman, rest of vlan still selecting cisco
as root. although cisco RSTP priority is default.
08-06-2019 02:13 AM
Hello,
are you running RSTP on the devices in the MRP ring as well ? If not, is that an option in your topology ? Check the requirements for such a setup in the link below:
08-06-2019 02:51 AM
yes my edge switches connected with cisco switches running MRP.
1 HM switch 1 port 1 & 10 connected with MRP and port 6 is connected with cisco switch. this switch performing as a Ring manager for HM switches.
2 HM switch2 port 1 & 10 are in MRP connected back to back with HM switches. and port 6 is connected with cisco switch.
08-06-2019 02:54 AM
08-06-2019 04:02 AM - edited 08-06-2019 04:04 AM
Hello
@Shani444 wrote:
Hi Friends,
i have cisco i5000 working as L3 intervlan routing at core layer and on distribution layer i have Hirschman switches. The problem is that, on distribution hirschman switches running MRP with access switches and RSTP with I5000. So i am receiving port flapping on cisco switch and and only vlan 1 selecting root as hirschman, rest of vlan still selecting cisco
as root. although cisco RSTP priority is default.
Cisco rstp and IEEE rstp should be compatible however i guess you cannot rule out stp incompatibility with Cisco and the Hirscham switches
Is this a new setup or a issue that has just appeared?
Are you setting the stp root to be the Cisco or Hirscham?
What does the logging report regards these port flaps?
08-06-2019 07:03 AM
08-28-2019 10:57 AM
Hi Paul,
Sorry for late reply. i have tried to solve this issue but couldn't solve yet. Now in my topology i have two layer 3 switches I5000 HSRP running on these switches and MRP configured on hirschman switches in the ring. as showing in the attached diagram connectivity. problem is when i do plug RSTP cable between Core 1 and Core 2 it start port flapping.
please let me know what i can do with that.
Regards
Shani
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