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- About Jon Marshall
08-21-2019
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Member since
09-22-2003
25575
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18071
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Jon Marshall
in Switching
Jon Marshall
in Switching
07-23-2019
12:03 AM
07-23-2019
12:03 AM
Correct in what you say.
That is a common setup when running mutiple vlans between two L3 switches ie. use a vlan for peering, vlan 100 in your case, and then make the other passive.
Jon
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07-15-2019
12:07 AM
Hi Reza
Going to try that later today, see what the state of the pins are.
I just want to make absolutely sure it is a chassis issue before having to swap it out as that is quite a big job.
Jon
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07-15-2019
12:05 AM
I agree very unusual but I know the power supply I inserted works as it was powering up a test chassis we have.
I thought it might be because of the power mode and/or because it is a 3000W power supply and the other power supply is 2500W but like I say the docs still say it should come online so not sure what is happening.
Obviously I want to make sure it is the chassis before having to swap that out as this is a core switch and would incur some downtime.
Nothing in the logs other than the OIR messages about removal and insertion of new power supplies.
Jon
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07-14-2019
03:16 AM
Guys
On a related note, I have just had to swap out a failed PSU from a system that was running 2 x 2500W in redundant mode.
The only spare PSU I had was a 3000W and according to the docs you should be able to insert it and it will power up and then take over as it has the higher power capability but it hasn't powered up and the system shows it is offline.
I have had failed fans and PSUs before but this suggests it could be the chassis itself.
Any of you ever seen anything like this or have any non service affecting things I can try ?
Jon
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07-14-2019
01:06 AM
Hi Leo
It's a new one to me as well :)
I am just concerned about what happens if the active PSU fails.
Jon
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07-14-2019
01:05 AM
I have enough power yes but as I said to Reza, because it is not in redundant mode and it has not been configured in combined mode what happens if the active PSU fails ?
Jon
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07-14-2019
01:04 AM
Reza
Thanks, that explains the message I was seeing.
The big question is I suppose what happens if the active PSU fails, does it use the other one or does it reboot.
I may be better to put into combined mode, speaking of which the docs say you can switch between redundant and combined with no downtime.
Have you ever done it ?
Jon
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07-13-2019
02:55 PM
Hi Reza
I'm good but obviously forgetting some of my 6500 knowledge :).
Yes I am beginning to think the same to be honest, so if you don't mind some follow up questions -
1) If it is not actually running in redundant mode if the active PSU fails then would it still use the remaining PSU as that PSU can provide enough power ?
2) If PS2 fails and PS1 does not take over then should I be running in combined mode instead ie. do I need to change it for both PSUs to be used or would PS1 take over anyway.
3) Do you know what this part of the output means -
Note: PS2 capacity is limited to 2940.00 Watts (70.00 Amps @ 42V) when PS1 is not present
it is obviously using PS2 at the moment but why would it be limited without PS1
Sorry for all the questions but I am really not following what that output is telling me.
Jon
... View more
07-13-2019
12:25 PM
It's been a while since I had to do this and I have obviously forgotten most of it but I am having trouble understanding the below output -
DCP-6509A-DC1-CO#sh power system power redundancy mode = redundant system power total = 3795.12 Watts (90.36 Amps @ 42V) system power used = 1307.88 Watts (31.14 Amps @ 42V) system power available = 2487.24 Watts (59.22 Amps @ 42V) Power-Capacity PS-Fan Output Oper PS Type Watts A @42V Status Status State ---- ------------------ ------- ------ ------ ------ ----- 1 WS-CAC-3000W 2771.16 65.98 OK OK on 2 WS-CAC-4000W-INT 3795.12 90.36 OK OK on Note: PS2 capacity is limited to 2940.00 Watts (70.00 Amps @ 42V) when PS1 is not present Pwr-Requested Pwr-Allocated Admin Oper Slot Card-Type Watts A @42V Watts A @42V State State ---- ------------------ ------- ------ ------- ------ ----- ----- 2 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on 3 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on 5 WS-SUP720-3BXL 328.44 7.82 328.44 7.82 on on 6 (Redundant Sup) - - 328.44 7.82 - - system auxiliary power mode = off system auxiliary power redundancy operationally = non-redundant system primary connector power limit = 3780.00 Watts (90.00 Amps @ 42V) system auxiliary connector power limit = 0 Watt system primary power used = 1307.88 Watts (31.14 Amps @ 42V) system auxiliary power used = 0 Watt
so the system says it has 2 PSUs and both are operational and it is running in redundant mode.
Two things are confusing me -
1) this line - "system auxiliary power mode = off". I did a quick search and an answer was that it was because there was only one PSU in the chassis but this is clearly not the case from the above (and from a visual check) so what exactly does it mean ?
2) the docs say that to run in redundant mode each power supply must be the same wattage but the above PSUs aren't and yet it is saying it is running in redundant mode.
Can someone help clarify.
Jon
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Labels:
07-10-2019
11:51 PM
Just to add your non working router is not necessarily learning incorrect routes unless you want everything to go via the directly connected ISP.
It probably just means that as far as your non working router is concerned the better path to 8.8.8.8 is via the other router, better path being determined by the BGP best path algorithm.
So it may or may not be an issue depending on what exactly you want in terms of traffic paths.
Jon
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07-09-2019
11:47 PM
Can't give a definitive answer for your switch but I know that with 6500s and IOS 12.2 (old I know) that vlan IDs were global to the switch which meant you could not reuse vlan IDs as you want to here.
I have not come across a switch where you can reuse vlans but then to be honest I have never tried to do what you are doing so need to look.
Jon
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07-05-2019
05:00 AM
The two are used for different things.
AS path prepending affects traffic coming into your AS and local preference affects traffic going out of your AS.
If you want to use AS path prepending you should really only use your own AS to add to the path although it is not clear exactly what you are trying to do.
Jon
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Created by
Jon Marshall
in Switching
Jon Marshall
in Switching
07-04-2019
11:24 AM
07-04-2019
11:24 AM
So on the ESXi switch you have not configured a vlan ID ?
If so try adding this to the fa0/8 configuration on your switch -
int Fa0/8 switchport trunk native vlan 2
or configure a vlan ID of 2 on the ESXi switch.
Jon
... View more
07-02-2019
08:26 AM
You don't use logging to send the traffic to a remote device and even if you turned on ip debugging (which you don't want to do on a production router) it won't send the actual packets.
If you want to send the packets you need to mirror the port your router is on and then send on copy of that traffic to the port your server is connected to assuming your switch etc. supports that functionality.
Jon
... View more
07-02-2019
08:16 AM
It will be dropped at R4.
Routing is a two way thing ie. just because there is a path one way does not mean there is a path back so when you troubleshoot routing issues you have to remember to trace the path both ways and check for routes to and from the destination.
Jon
... View more
07-23-2019
Correct in what you say. That is a common setup when running mutiple
vlans between two L3 switches i...
07-15-2019
Hi Reza Going to try that later today, see what the state of the pins
are. I just want to make absol...
07-15-2019
I agree very unusual but I know the power supply I inserted works as it
was powering up a test chass...
07-14-2019
Guys On a related note, I have just had to swap out a failed PSU from a
system that was running 2 x ...
07-14-2019
Hi Leo It's a new one to me as well :) I am just concerned about what
happens if the active PSU fail...
07-14-2019
I have enough power yes but as I said to Reza, because it is not in
redundant mode and it has not be...
07-14-2019
Reza Thanks, that explains the message I was seeing. The big question is
I suppose what happens if t...
07-13-2019
Hi Reza I'm good but obviously forgetting some of my 6500 knowledge :).
Yes I am beginning to think ...
07-13-2019
It's been a while since I had to do this and I have obviously forgotten
most of it but I am having t...
Created by
Jon Marshall
in Routing
07-10-2019
07-10-2019
Just to add your non working router is not necessarily learning
incorrect routes unless you want eve...
07-09-2019
Can't give a definitive answer for your switch but I know that with
6500s and IOS 12.2 (old I know) ...
07-05-2019
The two are used for different things. AS path prepending affects
traffic coming into your AS and lo...
07-04-2019
So on the ESXi switch you have not configured a vlan ID ? If so try
adding this to the fa0/8 configu...
07-02-2019
You don't use logging to send the traffic to a remote device and even if
you turned on ip debugging ...
Public Statistics
| Date Registered | 09-22-2003 11:19 PM |
| Date Last Visited | 08-21-2019 12:28 AM |
| Total Messages Posted | 25,575 |
| Total Helpful Votes Received | 18071 |
Helpful Votes Given To
| User | Helpful Count |
|---|---|
| 70 | |
| 90 | |
| 115 | |
| 5 | |
| 5 |
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Helpful Votes From
| User | Helpful Count |
|---|---|
| 10 | |
| 5 | |
| 5 | |
| 10 | |
| 5 |
Awards
Hall of Fame
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2018 LAN WAN
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2017 LAN WAN
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2016 Firewalling LAN WAN
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2015 LAN WAN
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2019 Switching, Routing
