SNMP problem in Local Director 416 V4.2.3

I am unable to get SNMP response from local director :
herafter the snmp configuration .
snmp-server host 62.184.xx.yy
snmp-server enable traps
snmp-server community xxxxxxxxx
snmp-server contact Philippe
snmp-server location B2
What else should be in configuration to have the local director respond to
SNMP request from snmp-server host 62.184.xx.yy ?
Thanks for your help.

This is not expected behavior with the LD.
I did see one bug (CSCdw87752) regarding the LD duplicating multicast packets in 4.2.3. The scenario was slightly different. In the bug, the LD was duplicating multicast packets from a Checkpoint Firewall. That bug is fixed in version 4.2.4. I think it is likely that this fix will also fix your issue.
Let me know if that works or not...
-Steve

Similar Messages

Local Director 416 and IP Multicast

We are experiencing issues where a Local Director 416, running 4.2.3 code is duplicating a multicast stream received on it's private interface out it's public interface.
The LD interfaces are not secured as there is bridged traffic flowing through it.
Sniffs of the ports on the LD show a single order of packets going in, and an identical packet for every original received packet (two packets out for every one in). The duplicate packets have identical timestamps, IDs, etc.
Anyone ever see this and know of a solution?
Thanks!

This is not expected behavior with the LD.
I did see one bug (CSCdw87752) regarding the LD duplicating multicast packets in 4.2.3. The scenario was slightly different. In the bug, the LD was duplicating multicast packets from a Checkpoint Firewall. That bug is fixed in version 4.2.4. I think it is likely that this fix will also fix your issue.
Let me know if that works or not...
-Steve

Local Director 416 Seamless Real Changes

Say I have a Virtual:443 with two reals web01:6443 and web02:6443. Now I want to add in reals web03:6443 and web046443 and remove web01:6443 and web02:6443. But I don't want to disrupt any conversations that may already be in progress to one of those servers. How do I migrate to the new without disturbing the connections on the old but not allow any new connections to be made to the old? Thanks.

There is a well known problem of keeping a session bound to one physical real server after the session is setup on HTTP (open) transport and later moved to HTTPS (secure) transport protocol. In this case, the HTTP redirection should be setup at the application level. The server can send a redirect (either a 302 or an HREF embedded in the actual web page itself) to HTTP, so no load balancing takes place at the Local Director. Another possible solution would be to switch to HTTPS sooner, and perform the session opening encrypted. This is preferred also for encrypting the login username and password. If you keep the whole session running via HTTPS, the generic sticky can ensure that the same server will be used for a client. The second solution and configuration is described in this document. The HTTP traffic is limited to first contact with the site (the client can type simple site name to address bar). When reaching Local Director, the browser receives a 302 redirect message with the URL configured, including the HTTPS tag, so there is the complete name of the server to reach. The session (on application level) is built from the beginning with the secure server (the real servers do not handle HTTP at all). Tthe session continues with the unique server name, so it is always reaching the same.
http://cisco.com/en/US/products/hw/contnetw/ps1894/products_configuration_example09186a00801a7299.shtml#maintask1

HTTP probes not working on Local Director 416 using 4.2.4

Situation: We are using an LD-416 to load balance http and https requests for 4 web servers with publicly addressable IP's behind one publicly addressable virtual IP.
Desired: We would like to setup http probes to monitor a web page on the servers and fail them if the expected header result of 200 is not met.
Steps taken: Setup http probes to monitor one of the web servers per the Command Reference guide. Page used for testing is written to generate a header response other than the expected result. Commands entered:
1. probe real websrv04 HTTP 1
2. probehttp real websrv04 file /sw/testfileserver/badpage.asp expected 200 request HEAD
3. probeconfig HTTP 1
4. write t
5. write mem
Websrv04 is defined as a real server. We have also tried doing it by the IP address as well as leaving out those settings for which we're checking the defaults (ie. expected and request).
Expectation: The LD should run an http probe against websrv04 every ten seconds looking for the page "badpage.asp" and expect to receive a header result of 200. The first time the LD sees anything other than the expected result, it should fail the server.
Reality: The server never fails. We can even remove the page in question from the web server and the probe still will not fail the server.
Any and all help would be most greatly appreciated.

you need to configure a probe to the virtual address as well otherwise probing does not work.
This is done in the web document but it does not appear clearly that it is necessary. Hoewever, you need it to make it work.
Gilles.

Server load balancing on Local Director implementing HTTP redirection

Hi, got an interesting problem when implementing the HTTP redirection method of session persistance or stickiness when balancing a couple of web servers on a Local Director 416. The session persistance works fine but it looks like one of the two servers is getting all the traffic rather than balancing accross the two. The servers are equally spec'd and when it comes to the predictor setting for the virtual, I'm just using the defaults i.e. leastconns/roundrobin. Is there a better predictor setting to use?? Any input would be appreciated.
Rgds
Adam Lacoba

The loaded argument has worked well. Take note that this requires a value to be set with the weight command. It gives a specific amount of traffic to one, and then moves to the other.

Local Director & HTTP Redirection

Hi, just wondering if anyone has successfully implemented HTTP
redirection on Cisco Local Director 416 running ver 4.1.2 Basically I'm
after any pitfalls to look out for. Current implementation utilizes
generic session stickiness however this has problems for clients
trying to access our load balanced servers if they come from behind
multiple proxies via their ISP.
Servers are Private IP addressed (Firewall in front of LD performing NAT static
txlation)
On another point, how does the Cisco CS11000 (Arrowpoint) perform
session persistance/stickiness or what "better" ways does the
Arrowpoint acheive this as compared to Local Director?
Any helpful input would be much appreciated.
Rgds
Adam

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center (http://www.cisco.com/tac) or speak with a TAC engineer. You can open a TAC case online at http://www.cisco.com/tac/caseopen
If anyone else in the forum has some advice, please reply to this thread.
Thank you for posting.

Local Director Load Balancing question

Using IOS 3.2.2
I have a local director 416 with 2 real servers. I would like to send all traffic to 1 server and if it fails to switch over to the secondary server. The way I see to do it is to use weighted load balancing and set the weight of the 2nd server to zero. But if the primary server fails what will happen since the secondary server has a weight of zero.
Jason

Not being a Cisco employee, I guess I can't define what "proper" is, but with the backup command, you don't need to play with the weights at all.
You just bind the primary real server to the virtual, then assign a backup to the primary. The backup server does not get directly bound to the virtual, so the only way it's going to get any traffic is if the primary server is down.

Local Director 430

Hi
Can any one help?
walked in to new job first problem Cisco local director 430 version 4.1.2 no one know the password and they dont know where the software is
Is it possible to reset the password on this unit?
Thanks for any help
Regards
Nick

Not to worry i fixed it
Nick

Local Director SNMP for CPU and Memory

Is there any way to get the CPU and memory utilization from a Local Director using SNMP? When I do an SNMP walk, I don't see any objects for CPU and memory.
Thank you

There's a "Show cpu " commmand availabe. Type help or '?' for a list of available commands.

Local Director SNMP

below is the sh snmp output from my local director. I run snmpwalk and it coudn't connect to the device. Do i miss something..I basically want to enable SNMP on local director to view the bandwidth..
snmp-server host 10.X.X.X
no snmp-server enable traps
snmp-server community public
snmp-server contact Test
snmp-server location LOCATION

I tried both version 1 and 2...no response...
tried from Mandrake 10.snmpwalk -c public 1.1.1.1
and no response..any idea?

Weblogic's redirect and Local Director session stikiness.

Hi all,
We've been facing a very painfull problem in my company. Basically, it relates
to the fact that weblogic 'uselessly' makes a redirect to index.jsp everytime
somebody tries to reach our website.
The redirect itselve is bad, but when we have Local Director configured in front
of our farm, with stickness enabled, the damn think locks for 3+ seconds before
sending the also weird '0000' characters (that I suppose, indicate the page or
transaction was completed). This 0000 comes from Weblogic itself (we notice it
sends that even when we are not behind local director). We are also expiriencing
some premature session timeoffs... very weird.
Did anybody even configured WL 6.1 SP2 as the main webserver under a local director,
and faced the same problem? We are desperate here.
Thanks,
Rodrigo

One other thing ... using URL with openConnection we found that we had to
end-pad the stream with two additional bytes (ignored) to get the full
message committed. Could be the same freaky thing.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Rodrigo Rosa" <[email protected]> wrote in message
news:3c5f0dcb$[email protected]..
>
Hi all,
We've been facing a very painfull problem in my company. Basically, itrelates
to the fact that weblogic 'uselessly' makes a redirect to index.jspeverytime
somebody tries to reach our website.
The redirect itselve is bad, but when we have Local Director configured infront
of our farm, with stickness enabled, the damn think locks for 3+ secondsbefore
sending the also weird '0000' characters (that I suppose, indicate thepage or
transaction was completed). This 0000 comes from Weblogic itself (wenotice it
sends that even when we are not behind local director). We are alsoexpiriencing
some premature session timeoffs... very weird.
Did anybody even configured WL 6.1 SP2 as the main webserver under a localdirector,
and faced the same problem? We are desperate here.
Thanks,
Rodrigo

Local Director unable to detect a failed web site

Hi all,
I have configured the local director to load balance several web sites on two real servers. One of these sites is required to be configured in backup mode.
For some reason the local director is unable to detect the site has gone down (by stopping the site to update the web content), therefore not directing requests to the backup real server.
I am using IIS 5.0, since its quite popular out there, has anyone experienced a similar situation and if so, how did you resolve it?
thanks

Your problem is based in the Operating system, not the Local Director. The LD is a layer 3 device. Microsoft put their application architecture together different from the Unix world, ie: Any ip address bound to a MS box is answered for by the OS - not the application (IIS in this case) If IIS is hosed up the OS will still answer for the IP you have bound to the NIC of the OS - the OS does not care at layer 3 that you want a higher level reply - LD does its availability checking at Layer 3 - the OS layer for MS. In the Unix world when an application is bound to a port - ie: Apache to port 80, then the apache deamon answers for that ip/port - not the OS - Apache panics and it will not respond at Layer 3 - the OS could be fine, but the LD will know that ip/port is not responding and will take the appropriate actions by your LD config.
Check out the httpprobe feature of the LD - it lets you test for a file in a URL inside the LD.
Cheers

Local Director Remote Management

Is there any way to use SNMP to manage the Local Director. I have the SNMP community but I can't seem to change the server status from out of service to in service using snmpset (from UCD-SNMP). Am I doing this in vain. Are there any ways to do remote management of the LD or can it easily be scripted. Thanks.

you cannot SET values for the Local Director through SNMP. Just GET them.
There used to be a GUI for the LD, that works up to version 3.x. It no longer works in version 4.x. The name for it is CVS and it can take servers out of service. It does it by telnetting to the LD and issueing commands.
Also, the LD support Dynamic Feedback Protocol (DFP) which is a protocol that allows the LD to talk to an agent application (installed on the server) and can dynamically adjust the server weight according to load.
Hope that helps,
-Steve

Redirect, Weblogic and Local Director... unfortunate combination.

Hi all,
We've been facing a very painfull problem in my company. Basically, it relates
to the fact that weblogic 'uselessly' makes a redirect to index.jsp everytime
somebody tries to reach our website.
The redirect itselve is bad, but when we have Local Director configured in front
of our farm, with stickness enabled, the damn think locks for 3+ seconds before
sending the also weird '0000' characters (that I suppose, indicate the page or
transaction was completed). This 0000 comes from Weblogic itself (we notice it
sends that even when we are not behind local director). We are also expiriencing
some premature session timeoffs... very weird.
Did anybody even configured WL 6.1 SP2 as the main webserver under a local director,
and faced the same problem? We are desperate here.
Thanks,
Rodrigo

One other thing ... using URL with openConnection we found that we had to
end-pad the stream with two additional bytes (ignored) to get the full
message committed. Could be the same freaky thing.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Rodrigo Rosa" <[email protected]> wrote in message
news:3c5f0dcb$[email protected]..
>
Hi all,
We've been facing a very painfull problem in my company. Basically, itrelates
to the fact that weblogic 'uselessly' makes a redirect to index.jspeverytime
somebody tries to reach our website.
The redirect itselve is bad, but when we have Local Director configured infront
of our farm, with stickness enabled, the damn think locks for 3+ secondsbefore
sending the also weird '0000' characters (that I suppose, indicate thepage or
transaction was completed). This 0000 comes from Weblogic itself (wenotice it
sends that even when we are not behind local director). We are alsoexpiriencing
some premature session timeoffs... very weird.
Did anybody even configured WL 6.1 SP2 as the main webserver under a localdirector,
and faced the same problem? We are desperate here.
Thanks,
Rodrigo

Local Director rebooting

I'm having a problem with my LD rebooting on me. It seems that when I bring certain (virtual and real) server into service, my Local Director reboots. Has anyone seen this behaviour before?
Thanks,
Dave

Try updating your LD code to a newer release. I think I remember a bug on older code.

SNMP problem in Local Director 416 V4.2.3

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