Dynamic LBFO Load Balancing mode causing issues

Hi,
We`re running a couple of virtual machines with the
BIG-IP Virtual Edition in a Windows Server 2012 R2 Hyper-V cluster.
These virtual machines have had problems where traffic sent through the virtual machines doesn`t get through due to the MAC Addresses of the physical team NICs being replaced with the Mac Address from the team member actually used to transmit the
packet.
Reference:
Windows Server 2012 R2 NIC Teaming (LBFO) Deployment and Management
Blog post - Server 2012 Hyper-V / NIC Team Oddity
One of the comments in the blog-post states what we are seeing:
The reason for the MAC Address switching you’re seeing is that Server 2012 in some cases will replace the source MAC address on Ethernet frames with the MAC Address from the team member actually used to transmit the packet. The reason for this is that
if it always kept the MAC Address intact, the switch would throw alarms for “MAC flapping”, i.e. seeing a given MAC Address bouncing back and forth between switch ports.
When we changed the Load Balancing mode from Dynamic to Hyper-V port, the problem was resolved.
Is it possible to solve this problem while still using Dynamic as the Load Balancing mode? Would LACP instead of Switch independent teaming mode solve the problem?

@Rob Thanks, that`s useful information. Did they suggest any other solutions/workarounds? (such as LACP)
@Alex I understand that I need to configure my switches if I`m going to use LACP, but will LACP cause a different behaviour regarding the replacement of the source MAC address on Ethernet frames? In other words: Will LACP be an alternate solution/workaround
to using Hyper-V Port in Switch Independent mode?
I can't answer this from experience because I've never had this problem.
But, the basic issue with the switch-independent mode is that the physical switch is completely unaware that there is any team situation at all. It can only operate within the base rules of Ethernet, which say that a MAC address can only appear on one endpoint
at a time. So, if you have built a switch-independent team that crosses 4 physical adapters and a Hyper-V virtual switch on top of that, what the physical switch "sees" is four distinct endpoints that are hosting multiple MAC addresses. When one
of the virtual adapters transmits on a virtual switch, it could, depending on the load-balancing mode, use any of the four physical lines. If it uses the same source MAC address while communicating across all four lines, the switch might panic. It wants to
know where the MAC really is for purposes of knowing where to deliver its inbound packets, and depending on security configuration, to be sure that there's not an unauthorized spoofing attempt in progress. That's why the dynamic mode uses MAC substitution.
The Hyper-V port mode gets around this by locking each virtual adapter on to a single physical channel so that its MAC address doesn't move. This has a cost of not allowing traffic on any given virtual adapter to be load-balanced.
In a LACP connection, the physical switch is fully aware of the team, and furthermore, it knows that it's not an endpoint. All the MAC addresses of the virtual adapters are associated with this single aggregated tunnel, not the individual physical adapters.
When it comes down to deciding which of the physical adapters to use to carry any given transmission, that can be negotiated by the switches without the need to lock a MAC to a specific adapter. There isn't, or at least there shouldn't be, any need for the
dynamic mode to perform MAC substitution.
Again, I'm speaking from theory, not direct experience with what you're asking about. I do make regular use of the dynamic mode on LACP trunks, but I don't run any applications that would have this MAC sensitivity issue. For all I know, dynamic still performs
this substitution and I just don't understand why. Also, there's a chance your symptoms just happen to point to this substitution as being a problem. But, I would say there's a good chance that using Dynamic/LACP will solve your issue.
Eric Siron
Altaro Hyper-V Blog
I am an independent blog contributor, not an Altaro employee. I am solely responsible for the content of my posts.

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Hello,
I'm a newbie to routers and on this discussion.
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Eliviszopa,
Hi. My name is Tiya and I am one of the Cisco SMB Support Engineers. I have been eyeing your post and I would like to add a few recommendations.
From what I've gathered, you are having an initial problem with your Dual-WAN configuration, in that you are unable to have both WAN interfaces Live at the same time. I will list a few things that will help you in determining if there is an issue with your RV042's Dual-WAN configuration and connectivity.
I understand your Network Topology to be: [ISP Modem 1 & ISP Modem 2]---->RV042---->LAN Clients (PC).
First thing, we need to ensure your router it at the most current firmware version for optimal performance. The RV042 series routers are currently in their 3rd HW revision, so we also need to ensure we download the firmware that is compatible with the HW version of your RV042
To locate HW version:
Look on the bottom of your RV042.
You will find the Serial Number and MAC      address sticker.
The HW Version will be visible by the      Model Number on that sticker.
Image below has a Red Square around the      Model Number and HW version of an older RV042 as a reference. HW is indicated      with 'v' and rational number, i.e. v1.1, v2.0. Your sticker may look      slightly different, but the content will be the same:
Now that we are certain of the HW version, check the release notes below to check the best firmware version for your RV042. I have provided a link below to the RV042 Release Notes:
Firmware v 4.0.0.7 Release Notes:      http://www.cisco.com/en/US/docs/routers/csbr/rv0xx/release/rv0xx_rn_v4-0-0-7.pdf
Firmware v 1.3312.19-tm Release Notes:      http://www.cisco.com/en/US/docs/routers/csbr/rv042/release/notes/RV042_RN_v1-3-12-19-tm.pdf
If your RV042 is using neither of the 2 firmwares, follow this link to download the correct version for your router:
http://www.cisco.com/cisco/software/type.html?mdfid=282414010&flowid=784
I would recommend you download and      'flash' your RV042 with the current compatible version of firmware to      address the possibility of software corruption.
Now, we need to reset your RV042 to factory defaults to remove any parameters previously configured and also, in essence, clear the router's memory so that we can start afresh. When this happens, your RV042 will return all settings to their default state; in other words, it will be as if you are pulling it out of the box for a new install. To do this:
Disconnect the RV042 from your network,      so that the only item the RV042 is only connected to the power outlet.
Locate the reset button on your RV042.      This will be on the front of your router and it will be recessed a bit.
Use a small tipped item; paperclips      usually work best, to hold down the reset button for 30 secs. Anytime less      will not guarantee a full reset to factory defaults.
Connect your RV042 to your PC. After      about 30 secs, ensure that you have an IP address of 192.168.1.100 on your      PC.
Now, let's test each WAN port with each of your ISP connections.
The next few steps will take us through a process that will ensure both WAN ports are working, and ultimately will help is in determining your Dual-WAN connectivity performance.
Connect one of your DSL modems to WAN1 and configure the WAN1 interface accordingly:
· DSL connections typically are UN-bridged by default; where you will see the modem is performing NAT. You will use DHCP as the WAN tupe for UN-bridged DSL connection types. This UN-bridged state can be recognized quickly in a couple of ways.
o    There is a PRIVATE IP address displayed as the WAN1 IP address, e.g. 192.168.x.x. where X is a number 0-254, 10.x.x.x where X is a number 0-254, or less commonly, 172.16.x.x where X is a number 0-254.
o    When connecting to the modem directly to your PC, you are able to reach the Internet.
o    If your DSL connection is UN-bridged, you must make sure the LAN IP Subnet of your Modem and Router are NOT the same.
o    Again, you will use DHCP as the WAN type for UN-bridged DSL connection types.
· DSL connection that is Bridged will require a PPPoE Username AND Password. This PPPoE username and password will be entered on the RV042 under the WAN type PPPoE. PPPoE connections can be quickly recognized in the same manner:
o    There is a PUBLIC IP address displayed as the WAN1 IP address AFTER correctly configuring WAN interface to use PPPoE and using correct UN/PW.
o    You are NOT able to reach the Internet when connecting your PC directly to your RV042.
· Contact your ISP to assist you in determining the bridged state of your modem to be absolutely certain.
2.     After you have properly configured WAN1 and confirmed Internet connection, configure WAN2 in the same fashion.
3.     Change Primary WAN to WAN2 by going to the following location in the RV042:
· System Management>Dual-WAN> Smart-Link Backup Primary : WAN2 (change this option)
4.     Disconnect DSL Modem from WAN1 and connect to WAN2.
5.     Power cycle the DSL Modem, RV042, and also disconnect your PC from the router as well while it is powered down.
6.     After about 5-10 sec, and in this order, power on your Modem, power on you RV042, and reconnect your PC to one of the LAN ports of your RV042
7.     After about 30-60 secs, test for Internet connectivity.
Now we will do the same for your other ISP connection.
1.     Disconnect all devices from the RV042, save your PC.
2.     Change Primary WAN to WAN1 by going to the following location in the RV042:
· System Management>Dual-WAN> Smart-Link Backup Primary : WAN1 (change this option)
3.     Connect 2nd ISP connection to WAN1 and configure according to Modem configuration, either DHCP or PPPoE.
4.     Power cycle the DSL Modem, RV042, and also disconnect your PC from the router as well while it is powered down.
5.     After about 5-10 sec, and in this order, power on your Modem, power on you RV042, and reconnect your PC to one of the LAN ports of your RV042
6.     After about 30-60 secs, test for Internet connectivity.
7.     Do the same for WAN2 using your 2nd ISP connection
At this point, we should now know for certain if both WAN Interfaces will allow Internet connectivity.
If you have problems with these steps, repost with the steps you took and the results.
If things are OK, then we will continue with configuring the router for Load Balance Mode:
1.     Navigate to System Management>Dual-WAN and change your selection from Smart-Link Backup to Load balance
2.     Configure both WAN1 and WAN2 with the configuration that correlates to the Modem connection it will receive.
3.     Connect both Modems to the correct WAN port on the RV042.
4.     Power cycle all devices; Both Modems, RV042, and PC
5.     Navigate to RV042 management page and check to see if there are IP addresses for WAN1 & WAN2 Interfaces.
If you have problems with these steps, repost with the steps you took and the results. Let us know your results.

Linksys RV082 Load Balancing and VPN

We have 3 offices connected by VPN and are currently using RV082 routers for the endpoints. The 2 branch offices have service from a small wireless ISP in the area. We have recently brought DSL in to the main office in addition to the wireless ISP. There are about 20 workstations in the main office, and 2-5 in each of the other offices.
Right now we have the RV082 at the main office configured to use the DSL as the primary service and fail over to the wireless ISP in event of issues with the DSL. What we would like to do now is have load balancing for the main office and have the VPN endpoints run specifically on the wireless ISP (much lower latency than going through the DSL), failing over to the DSL when required. The ideal situation would allow us to specify traffic (ie - web, and email) for a 'preferred' WAN port so that it uses, for example the DSL circuit for email traffic until the DSL circuit goes down, then email traffic is automatically moved over.
I know that you can set rules in the load balancing configuration of the RV082 to direct traffic out a specific port. When I have configured these in the past for testing, the rules were not removed when the connection failed over, so any traffic that had a rule configured for the failed port stopped working.
All of the routers are running firmware version 2.0.0.19-tm.
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Thank you for the quick response. Perhaps I didn't explain the situation very well in my first post. We are currently using the Smartlink Backup functionality, and it is working correctly.
We would like to move to the Load Balance mode, because this will allow us to take better advantage of having two providers. The Auto Load Balance works fine except for certain sites, like a banking site. I understand that the way around this is to create a Protocol Binding rule, but is there a way to have Protocol Binding rules termporarily removed or modified in the event of a WAN failure, so that traffic will not get stuck being sent out to a service provider that is down? I have tested the Load Balance feature and created some Protocol Binding rules as a test. For example, I bound all HTTP (port 80) traffic to WAN1, then unplugged WAN1 to simulate an outage. All HTTP traffic stopped working after I unplugged WAN1, but all other traffic seamlessly continued to function as if nothing had changed.
Thanks!

SGD V4.5 JSP User load balancing

We are using the JSP load balancing as follows, we are in a round robin DNS environment , looking for user persistance.
// ** List of SGD servers
hosts = "https://mydomain.com"
// List of SGD servers to be used as potential targets (both modes)
hosts[0] = "https://eastserver1.com"
hosts[1] = "https://eastserver2.com"
hosts[2] = "https://westserver1.com"
hosts[3] = "https://westserver2.com"
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We are running into intermittent issue of no login screen coming up when using the high level DNS name, ie mydomain.com, just the sgd splash showing trying/selecting host:eastserver1.com
Your thoughts are appreciated.

You could read
https://blog.uvm.edu/jgm/2013/09/26/app-v-5-server-f5-load-balancers-and-kerberos/
https://blog.uvm.edu/jgm/2013/09/27/app-v-server-configuration-load-balanced-configuration/
http://social.technet.microsoft.com/Forums/en-US/2b39e2b8-aba1-4e96-b18f-c5bcb9f12687/load-balancing-two-appv-50-servers-the-publishing-service-is-not-able-to-contact-the-management?forum=mdopappv
http://www.thinclient.net/blog/?p=344
In fact I'm not sure if any of these really helps you, but they give some good advice
Falko
Twitter
@kirk_tn   |   Blog
kirxblog   |   Web
kirx.org   |   Fireside
appvbook.com

RV320 - Dual WAN - Load Balance Problem

Hi all,
I've just bought a RV320 Dual WAN router an try to get it running. My network setup looks lice the picture attached.
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Qustions:
1.
I want WAN1 to be the primary line to be used until capacity reached.
Currently for some reason I don't understand the cisco always uses WAN2.
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2.
I am using VOIP and need to route all VOIP traffic to WAN2 interface.
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Can I put VOIP into one VLAN group and allocated VLAN to one specific WAN interface?
Brgds

So, you can hear the phone ringing and answer it? which means that SIP pakets are coming through WAN to LAN and well redirected to the phone IP, but you cannot hear after that, which means that there could be a problem with the RTP packets.
If you have problem only with the incoming calls and not the outgoing, than try enable/disable SIP ALG (Firewall). If that doesn't fix the issue, try to allow (or even forward) from WAN to LAN RDP - UDP ports 16384-32767 to the phone IP.
Regards,
Kremena

Installing 2 Application server and 1 DB server and load balancing for 11i

Hi,
I need info on how to install and configure load balancing for 11.5.8 on Win2000. The scenario: 1 db server DB, 2 apps/web/forms servers AP1 and AP2. Using rapid install you can only specify one db server A and one form server in multi node installations, right? How do I install the form server on AP2? Can I use the same config.txt? The computer name for AP2 is different.
Thanks & Regards,
Jagal

I have the very same issue. We want to install 4 web/form servers on a hardware load-balancer and the issue is we can only specify one forms server.
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Thanks
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RV042 load balancing and OWA

I have a rv042 router with two internet connections. I have setp the WAN1 and WAN2 and set the load balance mode.
Surfing on internet is then not a problem and I checked that I was using the two internet connection.
However if I try to connect to my corporate (OWA) outlook web access i am looping on the first page where I should provide my credentials.
I know that most of the load balancer could be set up with a sticky bit to keep the session on the same WAN connection, but reading the documentation, googling and searching on this community I do not find any help.
Does someone have an idea and could help me.
Thanks in advance.

Hello,
i've have a RV042 too, and i have the same problem.
Loadbalance work for every single request, so every website get requests from both connection even if there is a single user browsing.
Website side, some requests are "logged in" (if request came from the same IP the user logged in), but not if request come from the other wan (because IP mismatch). I've experienced many problems with many websites, not only OWA, not only requesting me to log-in continously, but also server-side crash because server session get lost in the middle of transactions.
Protocol Binding is NOT the solution, since it will require to bind all HTTP to just one connection (this way, where is loadbalance?) and if that wan fails over you get lost of connectivity.
Right now I didn't found any solution to use loadbalancing correctly, the right way to do would be that the RV042 remember the association CLIENT/SERVER->WAN, so that once i client connect to a server the router whould use only that one WAN, and when a WAN fails the table get cleared to restart balancing requests on remaining WANs.
Hope to see this function on next firmware..

ISA570-Load balancing and Losing packets

I am load balancing two isp's. One isp is fine, but the other I have very high packet loss when pinging the corresponding wan interface from any machine located outside our network. During the packet loss, I cannot https to our firewall from outside our network, but I can rdp using a different address on that same isp and ping another machine located inside our network, it seems only the wan interface is having the issues. Our isp uses icmp to our wan interface and they started noticing the loss the other day, again the other isp loses no packets. I have no issues with clients losing connection from that isp so it looks like it is an issue from outside in only on that wan interface.
I have a spare ISA and that is experiencing no packet loss when using another ip from the problem isp on it's wan interface. The isa's have the same configuration and when I tried moving completely to the backup isa it continued with the same issue. Upgraded to a later firmware, still the same issue. I even took a laptop and put it on our switch that is before the isa and gave it a static public address and I can ping it with no problem from the outside. I can also ping from the laptop to the wan port of the prod isa that is losing packets and it replies as it should, which I assumed would lose packets if it were the isa having issues, but it didn't.
I know this has nothing to do with Cisco security services as on the backup firewall it was still losing packets when we moved the connections over to it.
I can ping from inside my network to the public wan address with no loss when outside machines are having problems.
I can ping the problem wan address from a laptop or from isa(IP = 64.x.x.42) to isa(IP = 64.x.x.45) with no packet loss.
This is a head scratcher and I need some real help here.

Never figured this one out. However, I was able to figure out how this starts. A couple of weeks ago we had an issue with an ISP and we disabled that interface during the day and re-enabled at the end of the day and thats when we noticed ICMP breaks to other ISP.. I don't know why but the ISP we renabled we can ping just fine, but the other one always has issues. The only fix is to enable link failover detection and both WAN interfaces become pingable again.
Now, we use load balancing and one issue we are experiencing is that randomly both WAN interfaces go down and I can confirm this with a ping utility we use off site that pings both WAN interfaces and also each ISP gateway they are connected to. When this happens the ISP's gateways are reachable and neither WAN interface on the ISA are. I am still on .15 version of the firmware, because there were too many issues with newer releases. Is this a known issue?

RV042 - Load Balancing question

Hi, I have the RV042 (firmware 1.3.13.02-tm) in Load Balancing mode. When I do a speedtest, the result is the total bandwidth available on my 2 connections, i.e. 8-9,000 Kbit/Sec (each line is approx 4,500 Kbit/Sec). When I stream from Netflix, the bandwidth throughput is about 4-4,5000 Kbit/Sec. Should not the RV042 stream Netflix as the combined speed between WAN 1 and 2, i.e. at 8-9,000?

Load balance permits more available bandwidth. It may effective double the speed because the requests have more pipe available to utilize but not because it increases the over all speed of your connection. If your connections are 5 mbit they remain 5 mbit.
-Tom
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Dynamic LBFO Load Balancing mode causing issues

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