Etherchannel Load-Balancing To Host (Confused)

I'm a bit confused as to how an etherchannel load-balances traffic across all the links, in the port-channel. If I have a 4 port etherchannel, to an AIX host, does the traffic load balance across all 4 ports? In reading the load-balancing documentation, it states that a global configuration of src-mac forwards traffic from the same host, over the same port, all the time, whereas it forwards traffic over different ports for other hosts. What if it's the same host tied into the port-channel? So if my AIX box has 4 ethernet cards in a port channel, each ethernet card goes over only one link? If the ethernet cards are bundled, into a port channel config, is there no way to load balance all the traffic? Maybe I'm misunderstanding the etherchannel configuration and how it works. Thanks for any and all help!!
Dan

Port channel is link aggregation for all traffic which will get distributed across all links. A given ip conversation will only travel down one of those links at any given time. The single ip conversation is not carried say for instance across all 4 links if it's a 4 port etherchannel.

Similar Messages

Etherchannel Load balancing

I have three Gigabit aggregated with LACP to a IBM server. When I ask one ftp from this server I saw the performance is around 80 MB/s, if I ask two ftp to different equipmpents the performance is 160 MB/s (it uses 2 of the links of the bundle). However if I ask for three ftp the performance keeps in 160 MB/s although it uses the three links of the bundle. Is there a limit for Cisco? Anyone knows the reason? It seems like we can transmit as maximum at 160 MB/s

Glen is absolutely correct. on layer 2 switches EtherChannel load balancing can use either source-MAC or destination-MAC address forwarding.
With source-MAC address forwarding, when packets are forwarded to an EtherChannel, the packets are distributed across the ports in the channel based on the source-MAC address of the incoming packet. Therefore, to provide load balancing, packets from different hosts use different ports in the channel, but packets from the same host use the same port in the channel. With destination-MAC address forwarding, when packets are forwarded to an EtherChannel, the packets are distributed across the ports in the channel based on the destination host MAC address of the incoming packet. Therefore, packets to the same destination are forwarded over the same port, and packets to a different destination are sent on a different port in the channel.
So with every different source or destination mac it will use a diff link. If there is a session started on a aprticular link for a source to a destination it will keep on using the same link until the session termiantes or link goes down.
HTH, Please rate if it helps.
-amit singh

Etherchannel load balancing options

Reading up on my Etherchannel load balancing options (src or dst, mac or IP) it seems to me that I don't have a good way of using Etherchannel to increase bandwidth in my situation. In my scenario, I have a Windows terminal server servicing a couple hundred users which are using a SQL database on a 2nd server. Both servers are on the same switch. Basically I only have one MAC and one IP. Is there a way to utilize multiple links in this scenario? It seems like I would need a packet based technique to take advantage of multiple channels and unfortunately that isn't an option with etherchannel. Thoughts?
Thanks,
Diego

Hi Diego,
If I understand you correctly, your scenario is similar to this
200users--Switch===channel===Switch--Server1+2
If that's how it is set up, then you have multiple source addresses with the same destination address. So if you select either 'source' or 'source and destination' as your frame distribution method, then you should have a pretty even distribution of traffic.
HTH,
Bobby
*Please rate helpful posts.

Etherchannel Load-Balance

Hi All,
I have one Catalyst 6509 connected to Catalyst 4500X-VSS using a Layer 2 Etherchannel.
So, 6509 are using src-dst-ip for Etherchannel Load Balance and 4500X are using src-dst-port.
Anyone knows if this will work fine or if I may have some problem?
Is recommended change that configuration or not?
Tks.

I agree with Karsten, That there would be any problem.
As you know Etherchannel is kind of load sharing among the links...It has its own way of load sharing/balancing the traffic if you leave it to default. (which means you might end up using the same link most often times if you dont change the default load balancing method). Hence we see people change the default method to the one which they want and get the nearest load sharing/balancing over the links utilization.
HTH
REgards
Inayath

IPS etherchannel load balancing design

Is it possible to do a etherchannel load balancing with the design attached? i know I need to configure vlan pairs but I'm not sure if it's possible with my current design

Etherchannel design will work with interface pair as well ,provided the design is appropriate to take care of the asymmetry.
Coming to your design, if i understand the requirement correctly, you wish to create etherchannel between 3750 stacked switch and the pair of CAT6K. Enabling VSS on the pair of CAT6K switches and then creating etherchannel should help.But the flow symmetry will not be guaranteed ( meaning the same IPS may not see the forward and the reverse packets of the flow).

EtherChannel load-balance on Catalyst 6500 running CatOS

I know EtherChannel load balancing can use either MAC addresses, IP addresses, or the TCP port numbers.
1 Can I config it to make sure every port under the same Channel group has the same traffic utilization?
2 If one of the Etherchannel physical port has traffic more than its physical bandwidth, why switch can't use another Etherchannel physical port to share the traffic?

Normally it will fairly well balance the traffic . There is no way to make sure each channel is exactly the same utilization wise . You can look at how it is load balanced and make a change from say mac to ip address if it looks like you aren't getting the balance you want . It would be very rare that you are going to fill one port on the channel without filling the rest almost the same .Exceptions would be if you most of your traffic is headed to one place like a certain server , even then if you used ip addresses in both directions as the load balance I think it would balance out pretty good. If it got to that point where one link was almost filled you would have to think about adding another port to the channel . This is a real good page http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml

Help choose the appropriate etherchannel load balance method

Hi
I have 2 network architectures :case A and case B (found architecture below)
Case A : one server connected on the switch on each site
Case B : 3 server connected on the switch behind a router on each site
2 site are connected by 2 wireless link :each wireless link have 105 Mbps bandwith (I absolutly need the agregate bandwith 210)
Site headquarter is the principal site and site backup is use to backup data located on the principal site
I use Gbit cisco 2960 switch
I use etherchannel to agregate the 2 switch port (port 1 and port 2) where the 2 wireless link are connected
I configure src-mac for case A but all trafic is send only on one wireless link .
Please help me to choose the more appropriate load balance method to load balance traffic between the 2 link for the case A and for the case B
Please advise
Thanks in advance

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Your Case A might be handled by port hashing, but unfortunately most Cisco platforms don't support it.
Your Case B isn't much better, as you only have 3 hosts on each side, and according to your drawing, they are behind routers, so you don't want to use MAC hashes. If you don't have port hashing, next best choice might be src-dest-IP hashing. Again, though, with just 3 hosts, your distribution will likely not be very balanced, especially over shorter time intervals.
To obtain best utilization of your links, you need some kind of better link bonding, such as MLPPP (unfortunately, usually won't scale to FE rates) or a hardware MUX. Next best option, if you could route across the links, would be something like Cisco's OER/PfR which can dynamically load balance.

CSS10500 Load Balancing Multiple Hosts

Hello,
I have a CSS10500 switch and i would like to load balance the connections to a couple of hosts. My setup (roughly) is as follows
int e1-RTR1-------->int e2-Host1
-------->int e3-Host2
and
int e5-RTR2------>int e6-Host1
------>int e7-Host2
How can i assing different interfaces to the two sets of hosts??? I want all ports (0-65535 and tcp/udp) to go to both sets. I made a circuit vlan 1 and assigned it an ip address but i cannot make a circuit vlan 2 and when i assign multiple addresses to vlan1 i cannot somehow assign interfaces to each ip.
Is there anything i can do??
Sorry for all the fuss i am new to the CSS concept.

Let's start with the basic
http://www.cisco.com/en/US/products/hw/contnetw/ps792/products_configuration_example09186a008009438d.shtml
If you can't make it work, get back to us with whatever you have configured.
Verify that you can ping the CSS from the router and the server.
Gilles.

IPS-Portchannel-EtherChannel Load Balancing

I have two 4506 switches and 2 IPS 4260
I have problem med Interfaces unjoin and join portchannel
GigabitEthernet3/23 left the port-channel Port-channel1
GigabitEthernet3/23 joined port-channel Port-channel1
The IPS interfaces
UDVIK01_AWG_IPS# sh interfaces brief
CC   Interface            Sensing State   Link   Inline Mode        Pair Status
*    Management0/0        Disabled        Up
     GigabitEthernet0/1   Disabled        Down   Unpaired           N/A
     GigabitEthernet2/0   Enabled         Up     Inline-vlan-pair   N/A
     GigabitEthernet2/1   Enabled         Up     Inline-vlan-pair   N/A
     GigabitEthernet2/2   Disabled        Down   Unpaired           N/A
     GigabitEthernet2/3   Disabled        Down   Unpaired           N/A
I have uploaded Debug file and other file of my configuration
Best Regard
Rene Rolsted

Debug from switch:
Dec 8 15:11:41.363: FEC: pagp_switch_hotstandby: for agport Po1
Dec 8 15:11:41.363: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
Dec 8 15:11:41.367: FEC: pagp_switch_port_down: Gi3/23 Inform yes
Dec 8 15:11:41.367: FEC: pagp_switch_invoke_port_down: Gi3/23
Dec 8 15:11:41.367: FEC: fec_unbundle: Gi3/23
Dec 8 15:11:41.367: FEC: pagp_switch_change_vgc: gcchngreq == 0 for Gi3/23
Dec 8 15:11:41.367: FEC: pagp_switch_change_vgc: Gi3/23 gcchngreq = 0 gc = 0
Dec 8 15:11:41.367: %EC-5-UNBUNDLE: Interface GigabitEthernet3/23 left the port-channel Port-channel1
Dec 8 15:11:41.367: FEC: pagp_switch_delete_port_from_agport_internal: delete_port_from_agport: for port Gi3/23
Dec 8 15:11:41.367: FEC: delete port (Gi3/23) from agport (Po1)
Dec 8 15:11:41.367: FEC: pagp_switch_delete_port_from_agport_list: afb->nports-- = 1 [Gi3/23]
Dec 8 15:11:41.367: FEC: Un-Bndl msg NOT send to PM for port Gi3/23 from Po1
Dec 8 15:11:41.367: FEC: pagp_switch_reset_load_index: reading load-index for port Po1
Dec 8 15:11:45.363: FEC: pagp_switch_port_up: Gi3/23
Dec 8 15:11:45.363: FEC: pagp_switch_invoke_port_up: Gi3/23
Dec 8 15:11:45.363: FEC: pagp_switch_agc_compatable: comparing GC values of Gi3/23 Gi3/24 flag = 1 1
Dec 8 15:11:45.363: FEC: pagp_switch_port_attrib_diff: Gi3/23 Gi3/24 same
Dec 8 15:11:45.363: FEC: pagp_switch_agc_compatable: GC values are compatable
Dec 8 15:11:45.363: FEC: fec_bundle: Gi3/23
Dec 8 15:11:45.363: FEC: add port (Gi3/23) to agport (Po1)
Dec 8 15:11:45.363: FEC: pagp_switch_add_port_to_agport_list: afb->nports++ = 2 [Gi3/23]
Dec 8 15:11:45.363: %EC-5-BUNDLE: Interface GigabitEthernet3/23 joined port-channel Port-channel1
Dec 8 15:11:45.363: FEC: pagp_switch_add_port_to_agport_internal: msg to PM to bundle port Gi3/23 with Po1
Dec 8 15:11:45.363: FEC: pagp_switch_want_to_bundle: Bndl msg to PM for port Gi3/23 to Agport Po1
Dec 8 15:11:45.363: FEC: pagp_switch_hotstandby: for agport Po1
Dec 8 15:11:45.363: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
Dec 8 15:11:45.367: FEC: pagp_switch_reset_load_index: reading load-index for port Po1
Dec 8 15:12:08.370: FEC: pagp_switch_hotstandby: for agport Po1
Dec 8 15:12:08.370: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
Dec 8 15:12:08.374: FEC: pagp_switch_port_down: Gi3/24 Inform yes
Dec 8 15:12:08.374: FEC: pagp_switch_invoke_port_down: Gi3/24
Dec 8 15:12:08.374: FEC: fec_unbundle: Gi3/24
Dec 8 15:12:08.374: FEC: pagp_switch_change_vgc: gcchngreq == 0 for Gi3/24
Dec 8 15:12:08.374: FEC: pagp_switch_change_vgc: Gi3/24 gcchngreq = 0 gc = 0
Dec 8 15:12:08.374: %EC-5-UNBUNDLE: Interface GigabitEthernet3/24 left the port-channel Port-channel1
Dec 8 15:12:08.374: FEC: pagp_switch_delete_port_from_agport_internal: delete_port_from_agport: for port Gi3/24
Dec 8 15:12:08.374: FEC: delete port (Gi3/24) from agport (Po1)
Dec 8 15:12:08.374: FEC: pagp_switch_delete_port_from_agport_list: afb->nports-- = 1 [Gi3/24]
Dec 8 15:12:08.374: FEC: Un-Bndl msg NOT send to PM for port Gi3/24 from Po1
Dec 8 15:12:08.374: FEC: pagp_switch_reset_load_index: reading load-index for port Po1
Dec 8 15:12:13.362: FEC: pagp_switch_port_up: Gi3/24
Dec 8 15:12:13.362: FEC: pagp_switch_invoke_port_up: Gi3/24
Dec 8 15:12:13.362: FEC: pagp_switch_agc_compatable: comparing GC values of Gi3/24 Gi3/23 flag = 1 1
Dec 8 15:12:13.362: FEC: pagp_switch_port_attrib_diff: Gi3/24 Gi3/23 same
Dec 8 15:12:13.362: FEC: pagp_switch_agc_compatable: GC values are compatable
Dec 8 15:12:13.362: FEC: fec_bundle: Gi3/24
Dec 8 15:12:13.362: FEC: add port (Gi3/24) to agport (Po1)
Dec 8 15:12:13.362: FEC: pagp_switch_add_port_to_agport_list: afb->nports++ = 2 [Gi3/24]
Dec 8 15:12:13.362: %EC-5-BUNDLE: Interface GigabitEthernet3/24 joined port-channel Port-channel1
Dec 8 15:12:13.362: FEC: pagp_switch_add_port_to_agport_internal: msg to PM to bundle port Gi3/24 with Po1
Dec 8 15:12:13.362: FEC: pagp_switch_want_to_bundle: Bndl msg to PM for port Gi3/24 to Agport Po1
Dec 8 15:12:13.362: FEC: pagp_switch_hotstandby: for agport Po1
Dec 8 15:12:13.362: FEC: pagp_switch_hotstandby: PAgP not enabled on agport Po1
Dec 8 15:12:13.366: FEC: pagp_switch_reset_load_index: reading load-index for port Po1

Load balancing host named site collection

I am jumping into the realm of host named site collection. While the learning experience has been good, still there are some questions unanswered. Please bare patience since my questions are long.
- I have a non host header site on port 80 that has https certificate added to IIS for supporting app store in https mode.
- I tried to created the host name site collection using https in this default port 80 non host header web application and was greeted with error. Then i extended the web app to different zone with port 443 . Then created the host header site collection
with https with web application name for extended 443 one. Creation went in fine.
- I tired to use IPs on now extended IIS site and bind certificates on that one. The site does not load. I do the same again in the default zone iss site, bind ips on that one and site loads. Now question is even though host header site collection was created
using extended web application url , why binding had to be done on default zone IIS site?
- Second test, i changed the authentication mode for extended, no effect on host named site collection but as soon as i changed it in default zone it reflected in host named site collection. I am confused why it needs extended zone url to create the https
site but every change done in default zone is getting reflected on this host named site collection.
Now for load balancing , it works fine with IP? But how to load balance these host named site collection using url. I talked with f5 team and they said i need to send some reply query string from each site. Where do i do that? Or is it even needed?
Accoring to this link : https://devcentral.f5.com/articles/name-based-virtual-hosting-with-ltm
. If the site hosts an application, though, the monitor should request a dynamic page on each webserver which forces a transaction with the application to verify its health and returns a specific phrase upon success.
For application monitoring, the recommended best practice is to create such a script specific to your application, configure the monitor Send string to call that script, and set the Receive string to match that phrase.
Has any one done this before? I tired to search for resource regarding this for iis or sharepoint but was not able to get anything.
Thank you for your patience for reading such a long question.
Adit

first part of question:
Default Web Appliction in port 80: Creating https host named site collection fails.
Extend default web application on port 443 : Https hostnamed site collection created when web application name is passed for extended web application on port 443. This means this site collection is associated with this extended web application correct? But
all the changes made in IIS only reflect if it is made to port 80 web application. Also changing authentication scheme from Central Admin, only changes on default zone reflects on site collection not the one in extended web application? Why if the site
was only created on extended web application paremeter, changes on default are reflecting on it but not from extended.
Second part of question:
Each Hostnamed site collection when load balanced thorough f5 using IP for 3 WFE uses 3 IPs for each. This way we will run out of IPs pretty soon. I want to know if there is way to load balance these sites using Hostname or anyother paramenter through f5
and if any body has done it?
https://devcentral.f5.com/articles/name-based-virtual-hosting-with-ltm link talks about sending reply string
from application but i do not know where to set it up or how to do it? No resources in the net. Just asking if any one else has done it.
Adit

Unequal Load Balance on Etherchannel (L2/SW3400ME)

Hi, i have a problem with my L2 port-channel between 2 SW ME-3400-24TS-D (12.2(44)SE5), there is a unequal load balance and i don't know how to fixed. Should I change the load balance method?.
All four ports have the same config, except one (int fa0/1 on SW_2) that have this commands:
MAMANIVLN1P1IRA1#SH RUN INT FA0/1 | INC hold
hold-queue 4096 in
hold-queue 4096 out
Should i change this hold-queue config?
Here more outputs where you can see the diference, one link has 2mb and the other link has 60mb,, that's a big diference, i would like to know how to solve this:
SW_1#sh int fa0/9 | inc (Desc|rate)
Description: !!!!!! HACIA SW_2 !!!!!
Queueing strategy: fifo
5 minute input rate 2088000 bits/sec, 2065 packets/sec
5 minute output rate 25000 bits/sec, 46 packets/sec
SW_1#sh int fa0/10 | inc (Desc|rate)
Description: PORTCHANNEL10 HACIA SW_2
Queueing strategy: fifo
5 minute input rate 1905000 bits/sec, 1948 packets/sec
5 minute output rate 63348000 bits/sec, 6095 packets/sec
SW_2#sh int fa0/1 | inc (Desc|rate)
Description: Hacia SW_1_Fa0/9
Queueing strategy: fifo
30 second input rate 27000 bits/sec, 48 packets/sec
30 second output rate 2385000 bits/sec, 1996 packets/sec
SW_2#sh int fa0/2 | inc (Desc|rate)
Description: PORTCHANNEL10 HACIA SW_1
Queueing strategy: fifo
5 minute input rate 63567000 bits/sec, 6114 packets/sec
5 minute output rate 1935000 bits/sec, 1976 packets/sec
more outputs...
SW_1#sh etherchannel load-balance
EtherChannel Load-Balancing Configuration:
src-mac
EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source MAC address
IPv4: Source MAC address
SW_2#sh etherchannel load-balance
EtherChannel Load-Balancing Configuration:
src-mac
EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source MAC address
IPv4: Source MAC address
SW_1#SH MAC ADDress-table INTerface po10 | inc Total
Total Mac Addresses for this criterion: 297
SW_2#SH MAC ADDress-table INTerface po10 | inc Total
Total Mac Addresses for this criterion: 66
In advance thanks for the help.

Normally it will fairly well balance the traffic . There is no way to make sure each channel is exactly the same utilization wise . You can look at how it is load balanced and make a change from say mac to ip address if it looks like you aren't getting the balance you want . It would be very rare that you are going to fill one port on the channel without filling the rest almost the same .Exceptions would be if you most of your traffic is headed to one place like a certain server , even then if you used ip addresses in both directions as the load balance I think it would balance out pretty good. If it got to that point where one link was almost filled you would have to think about adding another port to the channel . This is a real good page http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml

LACP Load Balancing Method

We have two stack of 3750-X switchs interconnected through LACP, and a CheckPoint Firewall connected to one of the stack. The Firewall use a LACP bond to connect to the 3750-X Stack. On the Cisco switches we don't use any Layer3 functionality.
Since the switch are used in Layer2 mode, can we define the a load balancing method that use IP informations ?
For example Can we change the load balancing method from src-mac to src-dst-ip ?
BRgds

Hi,
yes you can choose the method of Load balancing in LACP:
port-channel load-balance {dst-ip | dst-mac | src-dst-ip | src-dst-mac | src-ip | src-mac}
Configure an EtherChannel load-balancing method.
The default is src-mac.
Select one of these load-distribution methods:
•dst-ip—Load distribution is based on the destination-host IP address.
•dst-mac—Load distribution is based on the destination-host MAC address of the incoming packet.
•src-dst-ip—Load distribution is based on the source-and-destination host-IP address.
•src-dst-mac—Load distribution is based on the source-and-destination host-MAC address.
•src-ip—Load distribution is based on the source-host IP address.
•src-mac—Load distribution is based on the source-MAC address of the incoming packet.

IDSM-2 load balancing on inline mode is it possible ..?

Hi there .. I am currenty working on a project and need to find out as to whether etherchanelling load balancing can be configured between several IDSM-2 running on inline mode. The IPS 5.1 admin guide states that it is possible for IOS based switches having the IDSM-2 configured on promiscuous mode, however I have heard that it might also be possible to configure etherchannelling load balance when the IDSM-2 are on inline mode. Any help .. commments will be appreciated .. any links to refer to will be even better
Thanks !!!

To configure EtherChannel load balancing on IDSM-2, you must install Cisco IOS 12.2(18)SXE and have Supervisor Engine 720. Cisco IOS only supports promiscuous IDSM-2 EtherChanneling using VACL capture (not SPAN or monitor). Refer the URL
http://www.cisco.com/en/US/products/hw/vpndevc/ps4077/products_configuration_guide_chapter09186a008055df92.html#wp1044800

SUNW.gds for jboss + Load Balancing Group = Failed to connect to host ...

Hi all!
In a simple two node cluster (Solaris cluster 3.2) with quorum server I've created a resource for jboss 5.1.0 using SUNW.gds. It is supposed to be load-balanced. To achieve that I've followed instructions from [http://download.oracle.com/docs/cd/E18728_01/html/821-1258/gds-25.html]
The command I've used to create the resource was:
clresource create -g scalable-rg -t SUNW.gds -p resource_dependencies=vip -p Scalable=TRUE -p Start_timeout=400 -p Stop_timeout=400 -p Probe_timeout=30 -p Port_list=8080/tcp -p Start_command="/opt/jboss-5.1.0.GA/bin/run.sh -b 0.0.0.0" -p Child_mon_level=0 -p Failover_enabled=TRUE -p Stop_signal=15 -p Load_balancing_policy=LB_STICKY_WILD jboss-rs
The whole configuration seems to work, but when the second node joins cluster, resource with jboss can't bind to shared ip address. There are many entries in /var/adm/messages like:
Jan 19 13:46:35 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 141062 daemon.error] Failed to connect to host vip and port 8080: Connection refused.
Jan 19 13:46:35 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 805735 daemon.error] Failed to connect to the host <vip> and port <8080>.
Jan 19 13:46:37 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 141062 daemon.error] Failed to connect to host vip and port 8080: Connection refused.
Jan 19 13:46:37 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 805735 daemon.error] Failed to connect to the host <vip> and port <8080>.
Jan 19 13:46:39 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 141062 daemon.error] Failed to connect to host vip and port 8080: Connection refused.
Jan 19 13:46:39 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 805735 daemon.error] Failed to connect to the host <vip> and port <8080>.
Jan 19 13:46:41 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 141062 daemon.error] Failed to connect to host vip and port 8080: Connection refused.
Jan 19 13:46:41 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 805735 daemon.error] Failed to connect to the host <vip> and port <8080>.
Jan 19 13:46:43 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 141062 daemon.error] Failed to connect to host vip and port 8080: Connection refused.
Jan 19 13:46:43 play SC[,SUNW.gds:6,scalable-rg,jboss-rs,gds_svc_start]: [ID 805735 daemon.error] Failed to connect to the host <vip> and port <8080>.
However, after some time, it finally somehow binds to shared ip and port 8080.
Is this something I should be worried about? Or it is a normal thing, since e.g. it takes some time to bring the interface with shared ip up? I've never had to install such configuration, and I don't have neither intuiton, nor the experience. Any help would be very appreciated.
Thanks a bunch,
Bart

Hi, a couple of things to check:
- did you check that both JBOSS instances were up and running?
- can you check in the logs (on both nodes) when a message saying something like "service .... registered..." showed up. This should show up for both JBOSS instances. From the time of the second "registered" message, the load balancer should sending incoming requests to both instances using its distribution mechanism
- did you check the vip address on one of the nodes on an external interface and on lo0 on the other
- connection refused looks like a server problem; can you connect to the JBOSS instance locally?
Hth
Hartmut

Load balancing on the local host only (6.40 Java)

Hello!
When configuring load balancing for Web AS 6.20 (Java), the property "LocalLoadBalancing" was available in the ServiceManager of the dispatcher. See Note 772561.
This property is not available in Web AS 6.40 (SP14).
How can I now ensure that a dispatcher does not connect to a server process on another physical server?
// Mikael

Hi Mikael,
In Web AS 6.40 this property is invalidated by the new <b>instance-based</b> cluster concept. In other words, when installing a Web AS 6.40 system you're installing instances (i.e. one central services instance, one java central instance, and 1-n dialog instances). A Web AS 6.40 instance contains one dispatcher and 1-n servers. The installation software (SAPinst) lets you install an instance on the same physical host only. Therefore, in 6.40 all servers that are behind the J2EE dispatcher are <b>always</b> on the same physical machine => the behavior of the LocalLoadBalancing property.
In 6.20, the installable unit is a dispatcher/server, and you can choose to distribute them to different physical hosts => the need to have the LocalLoadBalancing property to control remote/local LB.
Hope this explains things a bit.
P.S. In case you need more info about the cluster architecture of the Web AS Java 6.40, you can have a look <a href="http://help.sap.com/saphelp_nw04/helpdata/en/2e/611724f410254ca12a3f396ec5ae85/frameset.htm">here</a>.

Etherchannel Load-Balancing To Host (Confused)

Similar Messages

Maybe you are looking for