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Cannot Ping Nlb Cluster Ip From Different Subnet


After being up for nearly an hour, I received an e-mail stating that the cluster was no longer resolvable. Instead if we add a proxy they are able to do so. When invoking the Network Load Balancing remote control commands from a computer outside the cluster, there is no response from one or more cluster hosts. This video shows you how. weblink

This ensures that the network trace to be captured in the next steps will show ARP communication. Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! Maybe it's blocking one of the other IPs? ‹ Previous Thread|Next Thread › This site is managed for Microsoft by Neudesic, LLC. | © 2016 Microsoft. The two switches each have a connection to 2 ESXi hosts and the port #s are the same for both.03bf.0a01.003c is the cluster MAC and the cluster IP. https://blogs.technet.microsoft.com/networking/2009/01/15/unable-to-connect-to-windows-server-2008-nlb-virtual-ip-address-from-hosts-in-different-subnets-when-nlb-is-in-multicast-mode/

Cannot Ping Nlb Cluster Ip From Different Subnet

This is important since Active Directory uses Kerberos for authentication.  By default, if the time difference between systems is off by more … Active Directory Windows Server 2008 Windows OS Windows Regards.We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Your network guys should be able to make sense of this: When you try and Ping the cluster address of: “” from an external network, a configuration on the router is Allowed MAC Addresses (from Cisco’s website) These destination MAC addresses are allowed through the transparent firewall.

Cause: To view or change Network Load Balancing properties, you must be a member of the Administrators group. NLB cannot form a cluster when the 32-bit version of NLB is used on a 64-bit version computer. However, specifying the host by its priority (ID) works. Kb960916 Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the

We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. http://blogs.technet.com/b/nettracer/archive/2010/07/29/why-can-t-we-access-nlb-clusters-from-remote-subnets.aspx Hope this helps.We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Without the proper configuration on the switch you will not be able to connect to the Virtual IP address.This will not work because within the ARP request packet is a unicast https://social.technet.microsoft.com/Forums/office/en-US/ef56bd6d-68d3-403a-ac47-50c9ab4b15aa/got-request-timed-out-when-ping-network-load-balancing-nlb-cluster-ip?forum=winservergen Solution: Clear the switch's port to MAC address mapping.

Web Browsers Software Firewalls Hardware Firewalls Windows Networking Create a Query and Grouped Report and Modify Design using Access Video by: crystal Access reports are powerful and flexible. Nlb Cluster Ip Not Reachable You can also chec if the members send IGMP membership reports for the NLB IP even though it should be disabled. After the cluster hosts start, they begin converging, but they never complete convergence. Edited by Alex LvModerator Monday, April 28, 2014 6:26 AM Monday, April 28, 2014 6:25 AM Reply | Quote Moderator Microsoft is conducting an online survey to understand your opinion of

Nlb Host Unreachable

In theory, this allows the Cisco device to populate its mac-address-table. https://supportforums.cisco.com/discussion/11242916/problem-pinging-cluster-ip-ms-nlb-multicast-mode-vmware The two VMs are sat on the same physical blade and are built up exactly the same as they'll be used as SharePoint web front end servers. Cannot Ping Nlb Cluster Ip From Different Subnet The most common problem with that is to set affinity to "None" for stateful protocols which causes many NLB cluster access problems. 4) Do I run the latest TCPIP driver? (preferrably Nlb Unicast Vs Multicast Why does Multicast NLB work fine on Windows Server 2003?

Cause: A host is plugged into the wrong port on the switch. have a peek at these guys Cause: You have configured different cluster operation modes (unicast and multicast) on the hosts. What is the workaround to resolve this issue? iOS UI/UX Mobile Adobe Creative Suite CS Android Advertise Here 780 members asked questions and received personalized solutions in the past 7 days. Cannot Ping Cluster Ip Address

In the ARP request, we see the Sender IP address as 172.33.X.100(VIP), Sender MAC address as 03-bf-ac-20-10-64(Cluster Multicast MAC), Target Address as 172.33.X.1(default gateway) and Target MAC as 00-00-00-00-00-00. mona is not in the sudoers file. Must have been a coincidence... check over here Enter the host's fully qualified domain name.

Each VM has a single NIC.We are finding that after a few short minutes of inactivity, the NLB's IP address will timeout until the NIC on either VM is disabled/enabled, and Cluster Operation Mode Cause: If your cluster is configured for unicast mode, a switch might have learned the NLB network adapter's MAC address. This is because the MAC address is virtual Multicast MAC address.

I have a cluster IP of but this is only pingable from machines on the 10.35.1.x subnet.

Network Load Balancing is not load balancing applications, and the default host handles all the network traffic. Reply Follow UsPopular TagsLync 2010 TMG Direct access "Policy based routing" MaximumBlockSize R2 WDS TFTP TCP keepalive IPReassemblytimeout Syn attack synattackprotect EnablePMTUDiscovery performance NULL authentication NTLM Kerberos NLB multicast remote Netmon If I then 'stop' the node in NLB manager it still responds when I would expect it to stop answering on that IP. Windows Nlb Across Subnets The reason is that in Unicast NLB, the node sends ARP Requests with a Unicast Sender IP Address and a Unicast Sender MAC Address; the router will respond to ARP Requests

We have also tried adding a static entry to the MAC address table to meet the same results.Did something change with 2012? My cat sat down on my laptop, now the right side of my keyboard types the wrong characters A guy scammed me, but he gave me a bank account number & Cause: NLB UDP control ports are protected incorrectly by a firewall. this content Edited by Yagmoth555MVP, Moderator Saturday, April 19, 2014 2:13 AM Proposed as answer by Alex LvModerator Monday, April 21, 2014 1:43 AM Marked as answer by Alex LvModerator Thursday, May 08,

Reply Zhao Ji Ma -... 762 Posts Re: Issue: NLB can't ping cluster IP from outside cluster. On 2012, both were configured to be "Multiple Host Affinity: None", but set to Single on 2008. Solution: If you plan to use a 64-bit version computer environment, you must use the 64-bit NLB version. This means we should have a multicast MAC of "01-00-5E-31-32-9b" what we actually have is "03-bf-0a-31-32-9b" which means Microsoft have assigned their own first 24 bits.

Suggested Solutions Title # Comments Views Activity Access shared drive during VPN session 9 40 4d Skype for Business on-premises - new deployment - on-prem or O365 accounts? 5 66 104d Thanks for chiming in 🙂I ran into this again just a couple of days ago and had to reference my own post. Have you compared the Multicast IGMP mode for both, the 2012 and 2008 cluster?