11-30-2009 06:30 AM - edited 03-06-2019 08:46 AM
How to set up RSTP for HP switches 2650 which is connected to cisco 2821 ? Should I change anything on cisco device ?
We have a problem sometimes with our mitel phones, if somebody plugin 2 cables into it, it creates a network loop, this why I am going to use RSTP to prevent it.
Many thanks
Solved! Go to Solution.
12-01-2009 01:37 PM
Hello Vasily,
this means that PVST+ is running on cisco module
>> Spanning tree enabled protocol ieee
each instance follows 802.1D standard (legacy STP) that is not Rapid STP
interation with HP switches can be on vlan1 with a single instance.
If this module is central device in your topology enabling Rapid STP 802.1W or 802.1s on HP switches can be of limited help for overall convergence.
Hope to help
Giuseppe
11-30-2009 11:58 AM
Hello Vasily,
if the C2821 is only acting as L3 device nothing has to be changed on it.
if the C2821 has an etherswitch module you need to care of it.
Hope to help
Giuseppe
12-01-2009 02:43 AM
I have got "16 port 10BaseT/100BaseTx EtherSwitch on Slot 1"
NM-16ESW.
All hp switches have got 1 direct connection to the c2821.
What should I change in my configuration ?
Many thanks.
12-01-2009 06:44 AM
Hello Vasily,
in a multivendor scenario like yours the best option is to run MST 802.1s
start to see if the following is present in IOS help
spanning-tree mode ?
see
I'm not sure it is supported on the etherswitch module.
see
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gt1636nm.html#wp1048458
It doesn't mention STP mode commands and speaks of PVST+ (one instance per vlan).
if so no form of rapid STP is available either proprietary (Rapid PVST) either standards based (802.1s MST).
Hope to help
Giuseppe
12-01-2009 09:18 AM
I selected a check boxes on all hp switches through web interfaces with options
Configuration->Device features
Spanning tree = On
I did not change anything on cisco and run:
show spanning-tree summary
I am getting:
Root bridge for: VLAN2, VLAN3, VLAN4, VLAN7, VLAN9.
PortFast BPDU Guard is disabled
UplinkFast is disabled
BackboneFast is disabled
Name Blocking Listening Learning Forwarding STP Active
-------------------- -------- --------- -------- ---------- ----------
VLAN1 0 0 0 5 5
VLAN2 0 0 0 5 5
VLAN3 0 0 0 1 1
VLAN4 0 0 0 6 6
VLAN7 0 0 0 1 1
VLAN8 0 0 0 1 1
VLAN9 0 0 0 1 1
VLAN101 0 0 0 1 1
VLAN103 0 0 0 1 1
-------------------- -------- --------- -------- ---------- ----------
9 VLANs 0 0 0 22 22
show spanning-tree summary brief
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 32768
Address 000d.9d7f.c280
Cost 19
Port 53 (FastEthernet1/12)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address 001d.46dc.d75a
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet1/7 128.48 128 19 FWD 19 32768 001d.46dc.d75a 128.48
FastEthernet1/8 128.49 128 19 FWD 19 32768 001d.46dc.d75a 128.49
FastEthernet1/9 128.50 128 19 FWD 19 32768 001d.46dc.d75a 128.50
FastEthernet1/10 128.51 128 19 FWD 19 32768 001d.46dc.d75a 128.51
FastEthernet1/12 128.53 128 19 FWD 0 32768 000d.9d7f.c280 128.26
...
does this mean what spanning tree is working ?
12-01-2009 01:37 PM
Hello Vasily,
this means that PVST+ is running on cisco module
>> Spanning tree enabled protocol ieee
each instance follows 802.1D standard (legacy STP) that is not Rapid STP
interation with HP switches can be on vlan1 with a single instance.
If this module is central device in your topology enabling Rapid STP 802.1W or 802.1s on HP switches can be of limited help for overall convergence.
Hope to help
Giuseppe
12-02-2009 06:57 AM
I have found a document on HP web site: http://ftp.hp.com/pub/networking/software/AdvTraff-Oct2005-59908853-Chap05-STP_RSTP.pdf
and it was a quotation:
"
IEEE 802.1w RSTP is designed to be compatible with IEEE 802.1D STP. Even
if all the other devices in your network are using STP, you can enable RSTP
on your switch, and even using the default configuration values, your switch
will interoperate effectively with the STP devices. If any of the switch ports
are connected to switches or bridges on your network that do not support
RSTP, RSTP can still be used on this switch. RSTP automatically detects when
the switch ports are connected to non-RSTP devices in the spanning tree and
communicates with those devices using 802.1D STP BPDU packets.
"
I enabled RSTP on HP switches. At least it should protect from the network loop.
So I am going to test it during next 2-3 days.
12-09-2009 08:06 AM
Many thanks for your help,
RSTP is working.
I think what some issues(not RSTP related) what I have sometimes with my hp switches is due to old firmware installed on ones(I am going to update it).
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