Cisco Application :: ACE4710 TCP Connection Reuse
Jun 8, 2011
We have a rather strange issue, and I'm not sure it's really a problem with the ACE or not. We created an HTTP parameter map called "TCPreuse" and applied it to a virtual server. A show conn detail displays "[ conn in reuse pool : FALSE]" for all connections pertaining to this virtual server. The rserver in question is Linux(Ubuntu) + Apache.Next we applied the HTTP parameter map to another virtual server - this time IIS7 + Windows Server 2008. There are plenty of entries "[ conn in reuse pool : TRUE ]" when I do a "show conn detail".What could the web servers be doing differently that would cause the connection reuse to work on one virtual server and not the other?
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Nov 12, 2012
I have a ACE4710 setup to load balance a couple of web servers. The real servers all show as inservice as do the propbes and serverfarms/virtual servers. If I ping the Virtuual server ip address I get a reply but it I try to access VIP via telnet or web browser. I get a connection could not be open error on the client.The question is how do i determine where the error is comming from so far I can not tell if the client is getting through the acl or not.I have used the trouble shooting guide and nothing has worked to determine the cause so far. show service-policy int479 detail does not show an increase in the hit count when I try to connect.show stats conn does not show an increase in failed or timed out connections when i try to connect. [code]
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Apr 4, 2013
I try to make session-reuse working on an ACE-4710 Version A5(1.0) without success. Actually, I am facing the problem of the high number of backend HTTP connections that must pass through a firewall. I want to reduce this amount of open sessions with real servers by allowing the ACE to establish permament TCP connections with each rserver. However, it does not work as I expected. I still see individual TCP sessions established and closed after each GET - 200OK exchange. The parameter-map I have to enable this feature is as follows :
parameter-map type http PERF_YHA_HTTP_PARAM
persistence-rebalance
set header-maxparse-length 65535
set content-maxparse-length 65535
server-conn reuse
Note : I use PAT, on the backend, as required by the session-reuse feature
My questions are the followings :How many sessions the ACE would establish with a specific rserver ? only one ? one per TCP option set ?How much time a backend session would last if kept idle for a certain time ?What End Points must share the same TCP options to make sure session-reuse works ? Client to ACE ? ACE to rserver ? all together ?
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Sep 27, 2011
I have a problem, recently I can not telnet to the ACE 4710, the ACE version is A4(2.0). I can enter by web and console but not for telnet. I try to give more resource to the admin context but it doesnt work.
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Nov 9, 2011
I have to load balance traffic between 2 servers sitting behind the LB. The webservices are on HTTPS/8443. I followed the end to end configuration guide for SSL. No success.
Here is my configuration -
rserver host nms1
ip address 10.29.36.31
conn-limit max 4000000 min 4000000
[Code].....
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Sep 16, 2012
I need to upgrade 2 active-standby cisco ACE4710, the issue is I cannot access FTP/TFTP/SFTP server via Admin context but can be accessible via other contexts.
Can I copy the ACE system software file from FTP/SFTP/TFTP server to image: directory durectly or need some other way around ? I could see the option is available to copy ftp: to image: via other context.
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Jun 15, 2012
My customer they do not want change their real server IPs. So I need setup one interace (one armed) for them on ACE4710. Who had this sample configuration? (CSS has this but it seems to be not compitable with ACE)
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May 31, 2012
I am attempting to configure an ACE4710 to perform SSL end-to-end confguration. i.e. SSL termination - load balance - SSL initiate to backend server.The configuration appears to work fine in a test lab using any old web server, however when I peform the same configuration in the production environment it does not work. It appeatrs from a capture run on the ace that the ace is reseting the tcp connections after communicating with the back end server. The main difference I can think of in this environment is that the cert and key pair the ace is using where exported from the backend server, i.e. both the ace and the backend server have the same certificates and keys. Is this allowed? how to troubleshoot why the ace resets the connection.
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Jul 10, 2011
I have 2 ACE4710 in HA enviroment, they receive connection from Internet. What I need to configure is following:
The ACE have configured two URL, with the same port and VIP Address, for example:
URL-1: www.xxxxx.com
URL-2: www.xxxxx.com/Admin
VIP Address: 10.10.10.10
Port: 8443
All clients point to unique VIP and Port configured, I need to know if I can apply any filter or rule that allows me to distinguish when a customer goes to the URL1 or URL2.If any client try to access to URL-2, your traffic must be deny.In summary, from Internet I should be able to go only to URL-1.
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Dec 8, 2010
I have to deploy the Cisco GSS in our 2 dataceters globally seprate IP ranges to loadbalance the exchange 2010 environment with Cisco ACE 4710 series SLBs. The scenario is to deploy one GSS + ACE on each datacenters and our nameserver will point to both GSS's IP addresses to get through. Incase primary site "site A" goes down name server will point the client's request to "site B".
What will be the physical setup of the GSS here and what configuration should on SLB ACE will make it work? Do GSS and ACE need to be in the same vlan? is this necessary to use Both interface of the GSS to get things working? How the GSS will check the health check on ACE if they both are on different vlans/ip range? Our ACE will be in routed mode do we need to assign the Real server default gateway as ACE inside interface with the server farm or just do the SNAT of the client IPs so the request can come back to ACE?
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Dec 3, 2011
I have HA configuration for two ACE4710. FT between Ace's is configured as L2 (V LAN). Active ACE is sending heartbeats, but switch shows lot of 'input errors' on ingress and this is a major problem. FT is logically not working (there is no connection between these two Ace's over V LAN). There is only L2 configuration, with speed and duplex auto, no other special configuration. When I connect Ace's directly, FT is working without problem.
I can see lot of errors on input direction (from ACE) to switch port, that means, L1, or L2 problem, but direct connection (using the same Ethernet cable) is working. I tried 'shut/no shut' on both sides, set duplex/speed,... without success.
ACA IOS version is A4(1.x).
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Feb 11, 2013
Do you know if it is possible in ACE 4710 appliance to configure a SIP TLS ?The SIP probe we have in the configuration guide it is only for clear text. for Lync 2013 we need to establish first a TLS session and then within it, send an SIP request..IS it possible in any version? I tried also to configure a HTTPS probe but it fails as it sends a GET which the Lync SIP server doesn't understand.
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May 31, 2011
ACE 4710 deployment model. We'll be doing an eval later in the year, but I'm just looking to understand the architecture.We have a stack of 3750 switches with a single VLAN (10.1.1.0/24). Connected to that stack is a pair of web servers (10.1.1.5 and 6) that we want to provide load balancing/failover for. Some of the clients are located right there on that same VLAN. Other clients may be coming from other spots in the infrastructure.It sounds like I could put a pair of 4710s connected to that stack of switches, in a single arm deployment? And then the virtual IP and the real servers would all be 10.1.1.0/24. Maybe use an etherchanel to connect each 4710 to two 3750s?
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Apr 17, 2012
I'm implementing and found out some issues are unresolvable on ACE4710. This network have been running on a server without LB. Now the second server comes up. We choosed to implement with Routed Mode.This network Peak @ 300Mbps. Now on we're doing the first context which is function as content web-farm. In near future, 2nd context which takes care of indexing web-farm when they buy more server.
From following diagrams.I browsed from internet into this service. "show service-policy" shown as '0' (counter was not running). I guessed that there is something wrong in FW configuration. So I isolated out FW. Then I plugged-in my PC into network 30 (192.168.30.X) in front of this LB, then browsed into LB's VIP (192.168.30.1). LB "show service-policy" came up BUT there is nothing return to my PC (client). "show conn" on LB as "SYNSEEN". What's SYNSEEN?! Some meaningful.
Then I tried to figure out with a PC running 'apache' and took the place of real server. "It works!" returned from LB/Server. "show conn" became 'Establish' Programmer guy said if I browse into web-farm (i.e. content web-farm) directly pkt will be redirected to indexing server. But they said it will be L7 redirection. Not LB/Network level.
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Aug 31, 2011
We recently configured a setup to loadbalance 2 application server using ACE4710. Initially the configuration was to link two app servers directly to ACE4710 without connecting to a Switch, but later, it was advised that ACE4710 is not able to work without connecting to a switch.
1. ACE4710 is not able to link directly to APP/WEB server, but it must go through a network Switch.
2. If item-1 above is true. We used to have a older Cisco Loadbalancer which is able to link directly to WEB/APP servers. What is the reason or advantage of removing this feature?
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Oct 14, 2012
On my ACE4710s I'm using least-loaded predictors monitoring Microsoft Windows CPU usage. There are times when the MS Windows CPU OIDs can change between reboots. Any way for the ACE to automatically adjust to the new CPU OIDs and continue to get accurate CPU usage values?
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Mar 3, 2010
one of our 2 ACE boxes in FT group suddenly reboot-ed from active state and now it continuously reboots with the following error:
insmod: error inserting '/isan/bin/klm_octeon_device.klm': -1 No such deviceerror inserting /isan/bin/klm_octeon_device.klmDaughter Card Not Found. Rebooting..INIT: Sending all processes the TERM signal...
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Dec 16, 2012
We have a CSS11503 that is currently being used to accept incoming HTTPS and SSH connections on a specific VIP and then PAT those client connections. I understand that it also PATs the server initiated connections. [code]
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Jun 1, 2011
For server load balancing, does the ACE4710 support custom protocols? We'll be using HTTP for server health monitoring, and to determine if a server is up or down. But the client/server application is custom, and includes a lot of non-standard ports. Can the server VIP handle generic TCP connections? For example client1 connects to the VIP on http, but then later client1 switches to using tcp842 (a custom protocol, not http).
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Jan 4, 2013
My customer wants each ACE4710 (of a highly available cluster) to have its own, dedicated port for management purposes.
According to documentation, IP addressing can be applied to VLAN interfaces, so in order to satisfy the requirement, I should make one port belong to an "access VLAN X", and then apply IP addressing to the corresponding "interface VLAN X". This should satisfy my customer´s requirement in an indirect way.
But... ¿ Can´t I just configure IP address on one of the 4 ethernet ports in order to save the work of building the aforementioned VLAN? I am asking this since I do not have access to a real box in order to verify.
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Mar 28, 2012
I was trying to implement stickiness based on cookie. Server inserts a cookie and sends it to the browser. I learned from app team that this cookie is changing dynamically during the session, so stickiness based on server’s cookie doesn’t work.
Now I want to investigate into possibility of ACE to insert a cookie. My question is: ACE feature of “cookie insert”: does it add additional cookie into http header without removing server cookies or it deletes the cookie(s) that server put into http header and replaces them with its own cookie?
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Oct 12, 2011
We have an ACE Appliance in a DMZ and the ACE Appliance's Admin Context IP is translated between ACE and ANM. The ANM Server does not get translated. It is just the opposite then in another Community discussion.
Our Problem: When adding the ACE4710 Appliance to the ANM imported Device List, we use the ACE's NATed Admin Context IP. Import works well, but ANM reflects the Admin Context IP with it's real configured IP. Polling the ACE Appliance does not work therefore.
Is there a possibility of telling the ANM, that the ACE has to be polled through a NATed IP? I could not find a field to set a NATed Mgmt IP.
Configured IP on ACE Admin Context: 192.168.0.10
NATed ACE Admin Context IP: 172.16.0.10
Imported ACE with IP 172.16.0.10 into ANM, but ANM polls for Rserver, Vserver, Probes, etc. via 192.168.0.10 - which is not reachable from the ANM.
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Sep 25, 2012
I need to implement VSS on 6500 equipped with Sup720-10GE and WS-X6704; considering that this last 10G card doesn't support VSL, I need to realize VSS interchassis connections on Supervisor 10G interfaces, but I only have X2-10G-LR. Considering that the 2 6500 are in short distance (few meters): is it possible to use 10G long range optics and, if yes, do I need some additional patch?
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Jun 21, 2011
I am dropping a FIN packet in the server and sending the following request from the client
curl --local-port 56789 http://servername
At this point a session is created for the port no 56789.
Immediately ,(the port has not finished the transmission yet) , I am sending another request using the same port as following.
curl --local-port 56789 http://servername
Now the following error occurs .
curl: (7) bind failure: Address already in use
My question is how to reuse the same port (56789) again in this situation?
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Jul 19, 2011
Why do my connection not clear when my service goes to a down state. The only way I can get the connections to clear is by bouncing my content rule. CSS11503 version 08.20.4.05s - SSL all the way to the server --- I also have flow permanent port3 443 configured, but I don't understand why the other two servers go to zero while server01 never goes to zero. If I remove the flow permanent port3 all the counters go to zero, but I would think if the servers goes down then the connections should go to zero regardless of the flow permanent port configuration. [code]
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Jan 29, 2013
What exactly happens when the SSL connection rate is exceeded. Is the connection dropped, queued or what ?
Defined as the SSL TPS. In our case 1000 but upgradeable to 5000
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Dec 21, 2012
In my lab I have only one ESX server. On this server I am running VSM and vCenter (appliance).I am trying to get 1000v working however everytime I try to migrate my ports I get the following error:Network configuration change disconnected the host '192.168.0.10' from vCenter server and has been rolled back.fault.NetworkDisruptedAndConfigRolledBack.summaryIt seems that it doesn't like the fact that vCenter lives on the same ESX host as I'm trying to migrate. How I could get this to work?
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May 24, 2011
I have CSS CSS11501 which is working fine in single arm deployment. Now I want to have redudency so that in case the switch 1 where CSS is currenlty connected is down.I can reach the CSS through the second switch 2.Both the switch are trunk with each other and CSS has one port connected with Switch 2.
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Jul 9, 2011
monitoring oracle database performance by JDBC connection from CSS11506?
if it is not possible to do so, if there is otherway the system do eitehr application server or DB server is performance is too low?
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Feb 20, 2012
I require to connect a "css11501" two core switches to provide redundancy to the load balancing service and would like to verify this possible (Does the spanning-tree protocol officer for load balancing?)
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May 23, 2012
I'm expecting some problems with ACE. I've configured it to loadbalance between 4 nodes with SSL termination at ACE.
Everything was working fine up to the identification of a problem using firefox browser. With Chrome and IE works fine.
The user is trying to upload a file to one of the 4 nodes. When the costumer click at the send button, the Firefox shows the following message: Connection Reset.
This problem just happens when the user try to upload the file. Whe he's just surfing through the system, works fine.
------ Configuration ------
ACE-01-SJPR/eproc4# sh run
Generating configuration....
logging enable
[Code].....
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Oct 24, 2011
How do I apply the connection parameter map in a configuration like this to the service policy int827? Do I need to define the traffic? Can I specify only one source destination flow to apply the set tcp half-closed TCP normalization against?
policy-map type loadbalance first-match wss-1100-l7slb
class class-default
sticky-serverfarm sticky-srcip-1100
policy-map type loadbalance first-match wss-1101-l7slb
class class-default
sticky-serverfarm sticky-srcip-1101
[code].....
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Aug 7, 2011
I'm running v4.3.5 in our WAAS environment. At the CLI of one of our 7341 WAEs, there are several connections that show up [code] However, in the Central Manager nothing shows up - not even empty graphs - when I click on a device and go to monitor/connections statistics. After a few minutes, I do get an error message that states "Error retrieving connection stats. Please ensure that the device is online and then refresh." By the way, I get all other statics in the GUI such as Optimization Details Report, Traffic Summary Report, etc. Another thing, these WAEs are behind a router and supposedly the ports to allow access to/from the WAEs and other data is allowed through the firewall.
Is there some special port that needs to be opened on the firewall to allow for 'connection statistics' information displayed, that doesn't need to be opened for the other statistics to display? Or could this be a bug in the software?
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