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Total 12 documents matching your query.

1. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Thu, 13 Mar 2014 17:35:44 -0400; All, Figured I'd update all with the discovered problem in case it happens to you. My bare-metal vendor enabled uRFP on a some routers in their environment which causes the outgoing SYN-ACKs from the; /html/lvs-users/2014-03/msg00043.html (12,484 bytes)
2. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Wed, 05 Mar 2014 13:24:25 -0500; One more follow up to see if there are any other suggestions. Yesterday I added a sixth real server to the cluster. All of these servers are of the exact same type (bare metal machines). I installed; /html/lvs-users/2014-03/msg00019.html (14,109 bytes)
3. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Mon, 03 Mar 2014 13:54:20 -0500; On the failing real servers the response is sent but is never received by the client (e4:11:5b:ae:f9:e5). On the working server the response is sent and the client gets it and sends an ACK and the co; /html/lvs-users/2014-03/msg00018.html (12,474 bytes)
4. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Julian Anastasov <ja@xxxxxx>; Date: Mon, 3 Mar 2014 19:28:17 +0200 (EET); Hello, Response is going to e4:11:5b:ae:f9:e5 ? Do you see it reaching there? Also, simple test with client on LAN can reveal the problem, just check with tcpdump on client box. It can show if proble; /html/lvs-users/2014-03/msg00017.html (11,499 bytes)
5. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Mon, 03 Mar 2014 09:32:06 -0500; Julian, Thanks for the suggestions. The following shows the results with the failing servers: tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture size 65535 bytes 18:21:12.346348 I; /html/lvs-users/2014-03/msg00016.html (20,512 bytes)
6. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Julian Anastasov <ja@xxxxxx>; Date: Sat, 1 Mar 2014 21:01:46 +0200 (EET); Hello, If there is reponse, check on real server that it is correct: 1. It should contain VIP in saddr in IP header. This is expected because director should send the request to real server with VIP; /html/lvs-users/2014-03/msg00006.html (11,688 bytes)
7. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Sat, 01 Mar 2014 12:38:28 -0500; My current findings. The overall LVS cluster is working at a degraded performance because four of the five real servers are failing. The failure is strange. When a client sends a request to the VIP (; /html/lvs-users/2014-03/msg00005.html (17,966 bytes)
8. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Fri, 28 Feb 2014 16:25:00 -0500; Malcolm, If there is a conflict with performing both steps (iptables redirect and binding the VIP to lo:0) then I would think this should have failed when I first set it up. And now one real server i; /html/lvs-users/2014-03/msg00004.html (15,909 bytes)
9. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Malcolm Turnbull <malcolm@xxxxxxxxxxxxxxxx>; Date: Fri, 28 Feb 2014 20:23:06 +0000; Bruce, You definitely only need one, and personally I find the iptables method easiest. NB. Your apache instance must be configured to respond to the VIP as well as the RIP (heath checks are on the R; /html/lvs-users/2014-03/msg00003.html (14,546 bytes)
10. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Fri, 28 Feb 2014 15:01:26 -0500; I followed instructions from two sources 1) http://www.centos.org/docs/5/html/Virtual_Server_Administration/s2-lvs-direct-iptables-VSA.html I updated iptables using the commands on this page. 2) http; /html/lvs-users/2014-03/msg00002.html (13,176 bytes)
11. Re: [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Malcolm Turnbull <malcolm@xxxxxxxxxxxxxxxx>; Date: Fri, 28 Feb 2014 19:26:43 +0000; snip -- "I have setup LVS-DR using IPTables." Then why are you using a loopback adapter as well? You only need to use one method iptables REDIRECT .... or ... loopbackadapter + arptables settings SYN; /html/lvs-users/2014-03/msg00001.html (11,402 bytes)
12. [lvs-users] LVS-DR Cluster Some Real Servers Stuck in SYN_RECV (score: 1): Author: Bruce Rudolph <brudolph@xxxxxxxxxxx>; Date: Fri, 28 Feb 2014 14:21:23 -0500; I have an LVS-DR cluster which has been running for seven months without a hitch. Recently, the cluster started to timeout on the majority of connections. Some connections were passed through to a re; /html/lvs-users/2014-03/msg00000.html (9,717 bytes)

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