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June 18th, 2015 12:00
Help with STP mxl 10/40gbe and N4032
I seriously cannot get STP to work between these two for the life of me, any help would be appreciated.
Everything will connect and be fine for a while, but then I miss 10-20 pings for some reason. I am having a hard time even finding anything to work from in the logs/debugs. So if there is any suggestions for logs/debugs I need to turn on please let me know.
I have tried general ports vs trunk ports, trunking and not trunking specific vlans, even using RSTP instead of pvst but I still get the same issues.
Here is relevant configs from each switch
N4032
interface vlan 15 2
ip address 10.22.15.250 255.255.255.0
spanning-tree priority 28672
spanning-tree mode rapid-pvst
spanning-tree vlan 1 priority 36864
spanning-tree vlan 15 priority 36864
spanning-tree vlan 16 priority 36864
interface Te1/0/17
switchport mode trunk
switchport general pvid 15
switchport general allowed vlan add 15,16 tagged
switchport general allowed vlan add 1 tagged
exit
interface Te2/0/17
switchport mode trunk
switchport general pvid 15
switchport general allowed vlan add 15,16 tagged
switchport general allowed vlan add 1 tagged
exit
MXL 10/40gbE
protocol spanning-tree pvst
no disable
vlan 1-16 bridge-priority 61440
interface TenGigabitEthernet 0/51
no ip address
portmode hybrid
switchport
no spanning-tree pvst err-dis cause invalid-pvst-bpdu
no shutdown
!
interface TenGigabitEthernet 0/52
no ip address
portmode hybrid
switchport
no spanning-tree pvst err-dis cause invalid-pvst-bpdu
no shutdown
interface Vlan 15
ip address 10.22.15.122/24
tagged TenGigabitEthernet 0/1-5,51-52
no shutdown
!
interface Vlan 16
no ip address
tagged TenGigabitEthernet 0/1-5,51-52
no shutdown
Please Help!
ConNoob
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June 18th, 2015 17:00
Correct those ports are connected. I thought about doing a lag but didn't spend much time on it. Was hoping to figure out what I was missing with STP since I have already spent a bunch of time on it.
ConNoob
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June 18th, 2015 20:00
Also show logging doesn't show any STP changes, is it possible it could be something else I am not looking for?
ConNoob
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June 19th, 2015 12:00
Thanks, but even if one is discarding, it is normal for it to drop so many pings in what seems to be an election of some sort that often?
ConNoob
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June 22nd, 2015 10:00
Alright, Daniel, you have been great so far. I am hoping you can stay with me just a bit longer.
It looks like on the n4032 the ports that are connected to the mxl for STP are in a disabled state. I am still able to ping the mxl, but as I said, every once in a while it starts losing pings. These ports should be in a designated state which makes me thing the disabled state is causing issues.
When i put the ports in a lag, port-channel 1 is then listed as disabled for STP, but the ports in the port channel are listed as designated.
Any thoughts?
ConNoob
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June 22nd, 2015 15:00
Let me break it down a bit, there are two MXL switches, theses are not connected to each other and each only connect to the Dell N4032
I created a lag between onof the MXL and the 4032, and placed the other MXL with only one port connecting to the N4032.
Between both I am still having the intermittent dropping of pings. With two of the MXLs it is atleast nice to try two different things concurrently.
This is an output from a show spanning tree on the N4032
Te2/0/17 Enabled 128.85 0 DIS Disb No
Te2/0/18 Enabled 128.86 2000 FWD Desg No
Te1/0/18 Enabled 128.18 2000 FWD Desg No
Po2 Enabled 96.819 0 DIS Disb No
The two port 18s which are in the lag show as FWD, even though the lag they are in shows Disabled. Port 2/0/17 shows Disabled even though it isn't in a lag and pings occur over it(except for the intermittent issues). Seems odd to me.
Another thing to note, is that after these intermittent outages. When I check spanning tree on everyone, they don't show a topology change has occurred. Example being when I do a show spanning-tree they all show the the Last topology change was way before the intermittent outage. This is the only thing that makes me question if it is spanning-tree or not, but I don't know what else it can be and the logs aren't giving me anything useful.
I hope you can see something I don't.
Dell n4032
interface vlan 24 2
ip address 10.22.21.25 24.24.24.0
exit
spanning-tree priority 28672
spanning-tree mode pvst
spanning-tree vlan 1 priority 28672
interface Te1/0/17
shutdown
no spanning-tree auto-portfast
switchport mode trunk
switchport general allowed vlan add 24,25 tagged
exit
!
interface Te1/0/18
channel-group 2 mode active
switchport mode trunk
switchport general allowed vlan add 24,25 tagged
interface Te2/0/17
no spanning-tree auto-portfast
switchport mode trunk
switchport general allowed vlan add 24,25 tagged
switchport access vlan 24
exit
!
interface Te2/0/18
channel-group 2 mode active
switchport mode trunk
switchport general allowed vlan add 24,25 tagged
exit
interface port-channel 2
switchport mode general
switchport general allowed vlan add 24,25 tagged
switchport general allowed vlan add 1 tagged
exit
DellMXL 1
protocol spanning-tree rstp
no disable
bridge-priority 61440
interface TenGigabitEthernet 0/51
no ip address
portmode hybrid
switchport
no spanning-tree pvst err-dis cause invalid-pvst-bpdu
no shutdown
--More-- !
interface TenGigabitEthernet 0/52
no ip address
portmode hybrid
switchport
no spanning-tree pvst err-dis cause invalid-pvst-bpdu
no shutdown
interface Vlan 24
ip address 10.22.21.121/24
tagged TenGigabitEthernet 0/1-5,51-52
no shutdown
!
interface Vlan 25
no ip address
tagged TenGigabitEthernet 0/1-5,51-52
no shutdown
!
DellMXL 2
protocol spanning-tree pvst
--More-- no disable
vlan 1-25 bridge-priority 61440
extend system-id
interface TenGigabitEthernet 0/51
no ip address
!
port-channel-protocol LACP
port-channel 1 mode active
--More-- no shutdown
!
interface TenGigabitEthernet 0/52
no ip address
!
port-channel-protocol LACP
port-channel 1 mode active
no shutdown
interface Vlan 24
ip address 10.22.21.122/24
tagged TenGigabitEthernet 0/1-5
tagged Port-channel 1
no shutdown
!
interface Vlan 25
no ip address
tagged TenGigabitEthernet 0/1-5
tagged Port-channel 1
no shutdown
interface Port-channel 1
no ip address
portmode hybrid
switchport
no spanning-tree pvst err-dis cause invalid-pvst-bpdu
lacp long-timeout
no shutdown
ConNoob
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June 23rd, 2015 07:00
1/0/17 and 2/0/17 go in one MXL
1/0/18 and 2/0/18 go in the other MXL
I shutdown one of the 17s to see if I still got the drop packets/pings, and I do. But in that scenario STP should not be bouncing between ports because only one is active between them. This kind of makes me think that it might be some kind of trunking issue, but again, I am not getting any logs to give anything useful.
ConNoob
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July 20th, 2015 08:00
Daniel. Thanks SO much for your help. Sorry life blew up for a bit. I finally got the issue figured out though.
Management0/0 interface was still configure "ip address dhcp"
It seems that eveytime it tried to pull an IP, the IP I had configure under the VLAN stopped responding. This agrees with the fact that I couldn't really find anything in the logs, since this would seem to be functioning as intended.
Super annoying but got it figured out. Thanks sooo much for all your help and time.