ACE redundancy tracking and failure detection

Hello,
I have configured redundancy on a pair of ACEs, and looking now for the most approriate method of failure detection.
In the admin guide, 3 possible methodes are explained: host tracking, interface tracking and HSRP group tracking.
I don't have HSRP configured on the Supervisors in the ACEs chassis, the default gateway is on other chassis, so HSRP tracking is not an option.
The ACEs are configured in routed mode.
I have 1 VLAN with all VIPs, and 4 server VLANs.
There are 2 contexts active.
I was thinking of tracking all 5 VLAN interfaces + tracking the default gateway on client side.
Would this be a good approach?
thanks in advance for your input.

Hi ,
The ACE supports a maximum of 4,093 VLANs per system and a maximum of 1,024 shared VLANs per system.
Alos note that the ACE supports a maximum of 8,192 interfaces per system that include VLANs, shared VLANs, and BVI interfaces.
Regards,
Sachin

Similar Messages

Proxies: server load and failure detection

          Hi,
          Could you please help on a couple of issues:
          1. Does the load balancing algorithm take into account server load?
          - for HttpClusterServlet
          - for the Apache/IIS/NES plug-in
          2. How are failures detected?
          - it seems that they are only detected from a time-out in the proxy is that
          right?
          Thanks for your help!
          Regards,
          Frank Olsen
          Stonesoft


Load balancing of HTTP requests does not take into account server load. It relies
          on DNS round-robining to distribute servlet sessions, or whatever mechanisms the
          hardware load balancers (like Resonate or Alteon) use.
          Frank Olsen wrote:
          > Hi,
          >
          > Could you please help on a couple of issues:
          >
          > 1. Does the load balancing algorithm take into account server load?
          > - for HttpClusterServlet
          > - for the Apache/IIS/NES plug-in
          >
          > 2. How are failures detected?
          > - it seems that they are only detected from a time-out in the proxy is that
          > right?
          >
          > Thanks for your help!
          >
          > Regards,
          > Frank Olsen
          > Stonesoft

ACE ft track-host method

Hello,
does anyone know, how the ace performs ft track-host probes? How does it test, ICMP, arp, whatever? How often tests, what are the failure detection conditions?
For example in the following situation:
ft track host GW
track-host 10.1.201.14
priority 60
ft group 1
peer 1
peer priority 50
associate-context Admin
inservice
When we shut down the ACE 4710 uplink interface on the swtich, where it could reach the gw (10.1.210.14), no failover happens.
(I know that I can define own health probes, but I become curious about track-host command, while there are no definitions in the documentation about it's testing method)
Regards:
jonagy

Hello Jonagy,
I'm not sure if I fully understand your question, but let me see.
When configuring your ACE for Host tracking, you would first configure one or more probes to be applied to the Host Tracking configuration. Notice that Step 4 of the Configuring Tracking and Failure Detection for a Host or Gateway is not shown as Optional. You can configure the probes with the type and interval that best suites your environment.
ft track host TRACK_GATEWAY
track-host 192.161.100.1
probe GATEWAY_TRACK1 priority 10
probe GATEWAY_TRACK2 priority 20
priority 50
Hope this helps,
Sean

Node failed to join the cluster because it ould not send and receive failure detection network messages

One of my customers has a Windows Server 2008 R2 cluster for an Exchange 2010 Mailbox Database Availability Group. Lately, they've been having problems with one of their nodes (the one node that is on a different subnet in a different datacenter) where
their Exchange databases aren't replicating. While looking into this issue it seems that the problem is the Network Manager isn't started because the cluster service is failing. Since the issue seems to be with the cluster service, and not Exchange,
I'm asking here.
When the cluster service starts, it appears to start working, but within a few minutes the following is logged in the system event log.
FailoverClustering
1572
Critical
Cluster Virtual Adapter
Node 'nodename' failed to join the cluster because it could not send and receive failure detection network messages with other cluster nodes. ...
It seems that the problem is with the 169.254 address on the cluster virtual adapter. An entry in the cluster.log file says: Aborting connection because NetFT route to node nodename on virtual IP 169.254.1.44:~3343~ has failed to come up.
In my experience, you never have to mess with the cluster virtual adapter. I'm not sure what happened here, but I doubt it has been modified. I need the cluster to communicate with its other nodes on our routed 10. network. I've never experienced
this before and found little in my searches on the subject. Any idea how I can fix this?
Thanks,
Joe
Joseph M. Durnal MCM: Exchange 2010 MCITP: Enterprise Messaging Administrator, Exchange 2010 MCITP: Enterprise Messaging Administrator, MCITP: Enterprise Administrator

Hi,
I suspected an issue with communication on UDP port 3343. Please confirm the set rules for port 3343 on all the nodes in firewall and enabled all connections for all the profiles
in firewall on all the nodes are opened, or confirm the connectivity of all the node.
Use ipconfig /flushdns to update all the node DNS register, then confirm the DNS in your DNS server entry is correct.
The similar issue article:
Exchange 2010 DAG - NetworkManager has not yet been initialized
https://blogs.technet.com/b/dblanch/archive/2012/03/05/exchange-2010-dag-networkmanager-has-not-yet-been-initialized.aspx?Redirected=true
Hope this helps.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

My music app detect the track but the title is grey out, i cant select or play it directly, what i can do is select near by track and skip to that track, im using ios7,

Hi
I just updated my iphone 4s to ios7
Last time on ios6, i could play the track normally
But after i updated to 7, some of my music is unplayable directly
First it wont detect the track
If it do detect it, the track title will gray out and i cant select it
All i can do is select nearby track and skip to that track to play it
Any help would be appreciated
Thanks

Just to recap, this is a collection of ports I have collected over time for people who needed this information when setting up the HP ePrint app so that they could view their email from within the app. I am certain other applications also need this information. Although lengthy, I could not find a more comprehensive place to retrieve this information. Feel free to post additional information, faulty information, or other related topics below as this is simply a collection of data and it would be practically impossible to test all of them. Thank you!
Don't forgot to say thanks by giving "Kudos" if I helped solve your problem.
When a solution is found please mark the post that solves your issue.
Every problem has a solution!

ACE - Balance HTTP and sticky only SSL/TLS

Hi there,
I have a situation that I am trying to solve. We have lot of services trough ACE, but now I have to modify one of them, PROXY servers.
I have six (6) servers working with Sticky, but with a MASK 255.255.255.0, which produce an unbalanced situation some times, and that affect some servers on depending of how many users connected to that server. We have between 40K and 50K conns in that serverfarm, but in Sticky terms we have arround 700 /24 subnets.
I want to modify the configuration, specificaly the MASK to 255.255.255.255, which is going to increase a lot Sticky resources. But thinking in optimize Sticky resources, I want to know if there is a way to select only e-commerce, Home Banking or other kind of SSL/TSL traffic (always using port 80 trough proxy servers), so I could use Sticky only for connections that need it, and leave other HTTP traffic without this feature.
I´m sorry, may be I'm doing a silly question, but don´t have the experience to make this configuration, and I will apreciate your help.
Here is the actual configuration:
probe tcp HTTP
description Keepalive web servers
interval 20
passdetect interval 30
rserver host Server1
ip address 10.1.1.1
inservice
rserver host Server2
ip address 10.1.1.2
inservice
rserver host Server3
ip address 10.1.1.3
inservice
rserver host Server4
ip address 10.1.1.4
inservice
rserver host Server5
ip address 10.1.1.5
inservice
rserver host Server6
ip address 10.1.1.6
inservice
serverfarm host PRX
failaction purge
predictor leastconns
probe HTTP
rserver Server1
inservice
rserver Server2
inservice
rserver Server3
inservice
rserver Server4
inservice
rserver Server5
inservice
rserver Server6
inservice
sticky ip-netmask 255.255.255.0 address source sticky-PRX
timeout 60
serverfarm PRX
class-map match-any VIP-PRX
2 match virtual-address 10.10.10.101 tcp eq www
policy-map type loadbalance first-match POLICY-L7-PRX
class class-default
sticky-serverfarm sticky-PRX
policy-map multi-match PRX-Balance
class VIP-PRX
loadbalance vip inservice
loadbalance policy POLICY-L7-PRX
loadbalance vip icmp-reply
interface vlan 100
ip address 10.10.10.11 255.255.255.0
alias 10.10.10.10 255.255.255.0
peer ip address 10.10.10.12 255.255.255.0
no normalization
access-group output SOLO-SLB
service-policy input PRX-Balance
Thanks
Alexis

You might want to check out this new product called ITD.
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Redirect line-rate traffic to any devices, for example web cache engines, Web Accelerator Engines (WAE), video-caches, etc.
Capability to create clusters of devices, for example, Firewalls, Intrusion Prevention System (IPS), or Web Application Firewall (WAF), Hadoop cluster
IP-stickiness
Resilient (like resilient ECMP)
VIP based L4 load-balancing
NAT (available for EFT/PoC). Allows non-DSR deployments.
Weighted load-balancing
Load-balances to large number of devices/servers
ACL along with redirection and load balancing simultaneously.
Bi-directional flow-coherency. Traffic from A-->B and B-->A goes to same node.
Order of magnitude OPEX savings : reduction in configuration, and ease of deployment
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The servers/appliances don’t have to be directly connected to N7k
Monitoring the health of servers/appliances.
N + M redundancy.
Automatic failure handling of servers/appliances.
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Email Query or feedback:[email protected]

ACE 4710 FT failover failure

Hello,
I am running redundant ACE 4710 appliances running A3(2.7). I have five FT groups configured along with FT Tracking and when the vlans fail due to physical links being down, the contexts to do not failover. If one of the ACE boxes fail completely, failover works fine. I have included the FT config from one of the contexts below. I have a case open with TAC and the Engineer is suggesting the use of a query interface in additon to FT Tracking. We have had two incidents on separate contexts where we lost a physical interface on the primary ACE, one for the maintenance of the core switch, the other was a cable disconnect and we are unable to understand why the indivdual context didn't failover. Any ideas would be much appreciated. Let me know if more info/configs are needed.
Dave
ft interface vlan 900
ip address 10.10.10.1 255.255.255.0
peer ip address 10.10.10.2 255.255.255.0
no shutdown
ft peer 1
heartbeat interval 300
heartbeat count 20
ft-interface vlan 900
ft group 3
peer 1
no preempt
priority 210
peer priority 120
associate-context XYZ
inservice
FT Group                     : 3
No. of Contexts             : 1
Context Name                 : XYZ
Context Id                   : 2
Configured Status           : in-service
Maintenance mode             : MAINT_MODE_OFF
My State                   : FSM_FT_STATE_ACTIVE
My Config Priority           : 210
My Net Priority             : 210
My Preempt                   : Disabled
Peer State                   : FSM_FT_STATE_STANDBY_HOT
Peer Config Priority         : 120
Peer Net Priority           : 120
Peer Preempt                 : Disabled
Peer Id                     : 1
Last State Change time       : Wed Jan 11 13:14:16 2012
Running cfg sync enabled     : Enabled
Running cfg sync status     : Running configuration sync has completed
Startup cfg sync enabled     : Enabled
Startup cfg sync status     : Startup configuration sync has completed
Bulk sync done for ARP: 0
Bulk sync done for LB: 0
Bulk sync done for ICM: 0
show int
vlan424 is up, VLAN up on the physical port
Hardware type is VLAN
MAC address is 00:1e:68:1e:ba:b7
Virtual MAC address is 00:0b:fc:fe:1b:03
Mode : routed
IP address is 10.104.224.6 netmask is 255.255.255.0
FT status is active
Description:"New Server VIP and real"
MTU: 1500 bytes
Last cleared: never
Last Changed: Sun Mar 11 01:13:12 2012
No of transitions: 3
Alias IP address is 10.104.224.5 netmask is 255.255.255.0
Peer IP address is 10.104.224.7 Peer IP netmask is 255.255.255.0
Assigned on the physical port, up on the physical port
Previous State: Sun Mar 11 00:04:57 2012, VLAN not up on the physical port
Previous State: Sun Sep 18 10:21:15 2011, administratively up
     3991888419 unicast packets input, 23734607976687 bytes
     20246934 multicast, 174801 broadcast
     0 input errors, 0 unknown, 0 ignored, 0 unicast RPF drops
     1609345958 unicast packets output, 23690663385228 bytes
     7 multicast, 55807 broadcast
     0 output errors, 0 ignored

Dave,
For tracking to work you need to have preempt enabled. Can you try enabling preempt under the ft group and test your tracking again? Another potential issue you may run into is if your tracking is not lowering the priority enough when it fails. The difference between the active and standby device is 100. If you are not decrementing the priority greater than this value even if priority is enabled it will not lower it enough to force the failover. If after enabling preempt on this group the tracking still does not work as expected send you whole config for us to look at.
Regarding the query interface; This is not a bad idea. It will help prevent an active active situation if there is a problem with the ft link between the two modules.
Thanks
Jim

Directory Damage, what can be used for Disk Repair and Virus Detection?

Hi,
My eMac is acting up. Yesterday I started getting these messages that I needed to restart my computer (message was in a brown box window with an icon of a start up button in background).
I did the disk repair using Start up CD and it came back with "invalid key......." or something like that, and when I tried to repair it, it tried to repair the B-Tree's but then said it could not repair the problem.
I have Diskwarrior 3.03 Build 39, on a CD and on my FW Ext HD, which has a clone of my Mac HD.
Diskwarrior could not produce a graph of Mac HD because the directory was damaged. When I did a rebuild it hung on step 9 comparing directories, said there was 7 million + tests. ( I let it hang on step 9 for 15 hrs. to see if maybe it was just taking a long time due to corrupt directory). I finally clicked on Skip and got to the report page. I could do a preview, but the replace button is greyed out. When I was comparing the sizes of each folder, in both preview and original, I got a can not calculate error message on a few of them. The size of Mac HD in preview compared to the one in Original was different by 4 gbs. A week ago I repaired the Mac HD and did a Diskwarrior directory repair on all my HD's.
Before I do any reformatting of HD or other drastic measures, I was wondering what is safe to use for disk repair and virus detection. I know there is Norton System Works 3.0, Norton AntiVirus and TechTool, are these the only ones? Are these safe to use? Are there any other programs that can repair directory damage?
Thank you in advance,
Deb
eMac 2005 1.42GHz Combo Drive 256MB Tiger 10.4 75GB Mac OS X (10.4) Western Digital (WD) 160GB FW Ext & WD 320gb Media FW Ext, Creative Speakers

The long-standing rule of thimb has been that if Disk Warrior can't repair a mungled disk directory, then you're looking at reformatting or replacing the hard drive. Since this is a week-old hard drive, I'd suspect the replacement hard drive is itself bad. It might save you grief in the long run to contact the vendor who sold you the drive and inquire about their warrenty. You might want to first run the file system check utility fsck as described in Using Disk Utility and fsck
Directory repair and antivirus protection are different critters. Norton AV is mostly safe (if you don't mind it's track record of false positives) and is used by the IT department at the lab where I work. Norton SystemWorks, AKA Disk Doctor Kervorkian, is most assuredly NOT safe. For every poster reporting something nice about it, you'll find at least 2 dozen cursing it. It has a known track record of detecting problems no other utility finds and of "repairing" drives such that nothing can then read or repair the drive short of low-level reformatting (and occasionally even that fails).
Tech Tool Pro 4 has a good reputation, as does Drive Genius. Tiger OS X 10.4.2 and later include a version of Disk Utility that can for the first time also make effective B-tree and keys out of order and overlapped extent repairs. Still, my personal gut feeling is that if Disk Warrior is choking on the hard drive, you're looking at reformatring while zeros the drive (zeroing should detect and map out bad physical secotrs).
You can also refer to Disk First Aid: What to do when it finds an error and to Handling "overlapped extent allocation" errors reported by Disk Utility or fsck

Photoshop CS4 always crash (how may I track and fix an APPCRASH) ???

Hello
My Photoshop CS4 always crash when happens these conditions:
1. Open a file picture or create a file. (FILE 1)
2. Import another file picture... (FILE 2)
3. Copy FILE 2 in FILE 1
4. Now FILE 2 appear inside a layer...
5. Move with the mouse the layer corresponding to the FILE 2
CRAAAAAAASHHHH
BOOOOOOOOOOOOOOOOOOM
Always happens the same, always, always.
It is so annoying, that don't let me work and I am working right now with Photopaint (think I don't like).
I would need your help to tell em how may I track and fix an APPCRASH.
Do we have an application in windows that allow me to detect the causes of an APPCRASH?
Or is this just because the application is failing?
These are the data of the application crash:
Signature of the problem:
Nombre de evento de problema:    APPCRASH
Nombre de la aplicación:    Photoshop.exe
Versión de la aplicación:    11.0.1.0
Marca de tiempo de la aplicación:    499bf9b5
Nombre del módulo con errores:    StackHash_fd00
Versión del módulo con errores:    0.0.0.0
Marca de tiempo del módulo con errores:    00000000
Código de excepción:    c0000005
Desplazamiento de excepción:    65637275
Versión del sistema operativo:    6.0.6002.2.2.0.256.1
Id. de configuración regional:    3082
Información adicional 1:    fd00
Información adicional 2:    ea6f5fe8924aaa756324d57f87834160
Información adicional 3:    fd00
Información adicional 4:    ea6f5fe8924aaa756324d57f87834160
Additional information about the problem:
Id. de depósito:    1164041060
The texts are in Spanish sorry, I'm from Spain.
May someone help me to track and trace this bug and how to solve it?
Thanks

Prior to the subscription models—and of course that includes CS4—the Photoshop license was platform specific, either Windows or Mac, but not both. Your CS4 Windows serial number ("key") will never work on the Mac version.
CS4 is out of the loop as far as requesting a platform swap for a nominal fee. It is no longer supported by Adobe in any way. A platform swap required the destruction of your PC version, so you could not use both the PC and the Mac versions.
For a time, you could have used CS4 to upgrade to CS6 for about $200, but that time window has closed by now. Now you would have to own a legitimate version of CS5 in order to be eligible to buy an upgrade to CS6.
You can of course buy the full version of Photoshop CS6 Extended for $1,000 from the Adobe store:
Creative Suite 6
Alternatively, you can subscribe to Photoshop CC and Photoshop CC2014 on a monthly basis without ever owning the software. If you stop paying monthly, the software ceases to work.
The cheapest subscription is the Photography plan, which includes both Photoshop and Lightroom for $10 a month.
These are user forums; you are not addressing Adobe here. To contact Adobe support directly:
Click on the link below, and after that click on "Still need Help? Contact us."
Then on the next page, click Chat
http://helpx.adobe.com/contact.html?step=PHXS_downloading-installing-setting-up_licensing- activation.
There is also a phone option. 1 (800) 833-6687

Remote Office with Location tracking and WIPS

Hey guys,
I have a question about Cisco wireless for remote offices. My client is switching to Cisco for their wireless. The services that is going to be needed are location tracking and WIPS and data. The data part may come later and it is not approved yet. For now, it is going to be just location tracking for rogue devices etc and wIPS.
I know for data we can do Flexconnect, but for location tracking and wIPS, how are we going to deploy this? Does Flexconnect APs would be able to do LBS and wIPS services and data?
We currently have Moto APs deployed with 3 radios which is capable of LBS, wIPS, and data. Basically, the 3rd radio does the LBS and wIPS. Also, we are using the RF-Domain Manager per branch office. I am not sure if Cisco has something similar.
Thanks

So, you could do FlexConnect for the remote offices, but RLDP (wired detection) might not work:
http://www.cisco.com/en/US/products/ps10315/products_tech_note09186a0080b3690b.shtml#anc8
Domain Manager should be similar to PI:
http://www.cisco.com/en/US/products/ps12239/
HTH,
Steve
Please remember to rate useful posts, and mark questions as answered

DVD Burn fail, Sense Key = Hardware Error, Sense Code = 0x09, 0x01, TRACKING SERVO FAILURE, What could be the solution?

DVD Burn fail, Sense Key = Hardware Error, Sense Code = 0x09, 0x01, TRACKING SERVO FAILURE, What could be the solution?

There is only one option and that is to replace the drive. It is not expensive to perform the replacement yourself if you so choose.

Tracking and displaying previously approved access

We have a requirement that the Sun IM be capable of keeping track, and displaying the state, of the access that has been previously approved to the user. By performing changes to resource attributes (for example "NT Groups") under the attribute tab of the user it seems entirely possible that these attributes could later be modified directly within the resource hence changing what is reported when the user is viewed (or updated) again, hence giving an inaccurate view of what access the user is supposed to have. In contrast, by defining roles it seems that it is possible to track what attribute access has been approved (by Role approval) and hence what the access state of the user should be.
My question is whether the product is capable of reflecting the access that has been approved, and what the Sun recommended method(s) are for reflecting this when a user is edited (updated) or viewed?
PS - I have noticed that a Reconciliation Policy can be modified to detect whether native changes have taken place in a resource (irrespective of whether a roles or direct attribute modification took place to effect the original change), but that it is only possible to report this attribute change from within an Audit Report. Is there some way that this could be reflected within the form when a user is updated or viewed?

Hi,
Could you please share the solution if you were able to find one.
Thanks,
Vinu

Configuring NAC MANAGER HA - link failure detection

Hello,
I'm configuring HA in NAC Manager and want to enable "eth0 link failure detection based failover". Is this possible in version 4.1.2.1 ?
Where can i configure this in NAC Manager?
See my configurations for the Primary HA on pic attached.
kind regards,
Daniel Stefani

Hi Daniel,
It doesn't look like that's an option in the 4.1.2 line. You can configure this in 4.1.3 line, however - see the configuration guide here: http://www.cisco.com/en/US/docs/security/nac/appliance/configuration_guide/413/cam/m_ha.html#wp1040221
HTH,
Lauren

Why do I keep losing audio/recorded tracks and SFX in my projects? I have tried: Saving as archive file/searching package contents etc. to no avail. Can anyone help?

Why do I keep losing audio/recorded tracks and SFX in my projects? I have tried: Saving as archive file/searching package contents etc. to no avail. Can anyone help? It keeps telling me 'Audio file not found', and seems to be different tracks in the same project each time too.

iamthewaughrus wrote:
I also have this problem using Garageband in a school network situation when students open their project on one station, save it to their network drive, and later open it at a different station. 90% of the time there will be no issue, but sometimes audio files are lost. (Garageband '11, iMacs)
That sounds like it might be a failure of the students to perform a Save As and check Archive Project when they do. This asks GB to pull all the files it needs into the associated .band document rather than point to them externally (and then risk not having them be there).

Hardware error - Tracking servo failure - what does it mean?

Thanks in advance. I was trying to burn a disc, and started having trouble with burning this movie (have done several before, including earlier versions of this movie). After wierd things happening twice - the first disc would burn, then the second one might be o.k. but iDVD ejected it before it said it was done. Then, the third time I got this error:
The recording device reported the hardware error: Tracking servo failure. (0x09, 0x01.)
Any idea what this means and what I should do?
(I'm posting this on both the hardware and software locations since I'm not really sure which it is.)

Hi,
Thanks for the comments! The CD/DVD lens cleaner appears to have taken care of the problem! I was able to successfully do a backup of my hard drive with Toast (wouldn't work before, see below) and burn two copies of a movie using iDVD. (I put more details of the errors below in case that's helpful for someone else down the line.
I am trying to do the Apple Hardware Test, as you suggested, but need to double check a couple of things. When the article you put a link to mentions the "Apple Hardware Test CD" and the "system CD" are both references to the "Software Install and Restore" CDs? (Those are the only relevant-sounding ones I received, no "Hardware Test CD".) If I put those in, can I run the relevant tests without reinstalling the software (and presumably deleting the other files on my hard drive)?
I did do the steps suggested by PT up through the reboot, except for sort of doing Preferential Treatment out of order because it took me a bit to realize that if I made the window bigger it would show what to try (the error message was truncated and not viewable). Then, rather than trying iDVD again, I tried to use Toast to back up the computer to avoid having to pay for that in case what the Apple repair folks do would necessitate an overdue (and if done by them costly) backup. Toast crashed with remarkable similar messages:
The drive reported an error: Sense Key = ILLEGAL REQUEST Sense Code = 0x30, 0x05 CANNOT WRITE MEDIUM INCOMPATIBLE FORMAT
The drive reported an error: Sense Key = HARDWARE ERROR Sense Code = 0x44 INTERNAL TARGET FAILURE
The disk failed to be written.
Well, at least we have (so far) avoided the PBJ, in spite of having two wonderful children a year minus a week apart. (I'm afraid we did the adoption agency we used a disservice - we gave them our old non-Apple PC.)
Thanks so much.

ACE redundancy tracking and failure detection

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