Questions tagged [unicast]

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No ARP response using Unicast on VxLAN Overlay IPs in Linux server configurations

I am trying to setup a basic Unicast VxLAN between 3 Ubuntu 22.04 virtual servers (underlay IPs : 172.16.30.26/24, 27 and 28) running on VirtualBox. No firewalls are active. UFW is removed. After the ...
nata11's user avatar
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1 answer
492 views

Why do I see unicast packets for a different IP when I sniff my interface?

I hook up a laptop via gigabit Ethernet to my corporate network and run Wireshark on the interface. I expect to see all broadcast and multicast traffic and unicast traffic either originating from or ...
petiepooo's user avatar
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3 votes
2 answers
9k views

How should I configure properly my LAN to use IPv6 for communication on LAN and WAN?

I would like to use IPv6 on my LAN and would like to be able to go out to the WAN as well. My network is a classic IPv4 environment. It works well. My ISP provides Global Unicast IPv6 address on the ...
supi007's user avatar
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1 answer
770 views

DHCP & macvlan: Only first virtual interface works with unicast DHCPREQUEST

What I am trying to do? I'm trying to acquire 3 public IP addresses via DHCP on a single physical ISP upstream cable. What goes wrong? Renewals go kind of wrong. From interfaces, virtual0 works just ...
Janne Paalijarvi's user avatar
3 votes
1 answer
181 views

MAC layer unicast flooding a switched network

The network in question: It is a fully switched network with no routing. There is no known RSPT problems. There are 10 small switches. Each small switch has many small industrial devices talking to ...
ugn's user avatar
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2 answers
415 views

VXLAN with unicast only transport?

I started looking into VXLAN recently and I am trying to grasp the basic concepts of it. The standard use of VXLAN transport appears to be multicast, however many ISPs do not allow multicast traffic. ...
A. Smith's user avatar
2 votes
1 answer
8k views

Keepalived: multicast vs unicast

I'm planning to deploy a several keepalived routers to maintain floating IPs for different database clusters. The plan is to deploy a separate VRRP instance on each cluster locally according to this ...
HTF's user avatar
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9 votes
2 answers
32k views

How to determine IP address is unicast or anycast? [closed]

I searched the Internet and unable to find an answer. Anyone can help?
John Wong's user avatar
  • 176
2 votes
1 answer
6k views

KeepAliveD, Rackspace Cloud, Unicast - both LB's enter MASTER state...?

I have set up two HAProxy Load Balancers in an Active->Passive pair. KeepAliveD will be used for failover between MASTER and BACKUP servers. Like most clouds, Multicast is not supported so I cannot ...
Chris Rosillo's user avatar
0 votes
2 answers
515 views

Oracle Weblogic 10.3.5 Cluster creation issues

I'm trying to create a two node cluster with Oracle Weblogic 10.3.5. During the "Fusion Middleware Configuration Wizard" setup process, I'm not sure what to put in for the "Cluster Address" if I ...
user6123723's user avatar
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2 answers
1k views

Can heavy UDP traffic create network congestion?

I have three IP addresses using the same gateway. Two of them are configured as a cluster with multicast address setup. If there is a heavy UDP traffic between those two, can that affect the network ...
cbrdy's user avatar
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1 vote
1 answer
9k views

could corosync can support unicast heartbeat mode?

could corosync can support unicast heartbeat mode? from another thread in serverfault, some guy raised below corosync conf: totem { version: 2 secauth: off interface { ...
Emre He's user avatar
  • 121
7 votes
1 answer
13k views

Why ARP request is unicast?

I have a wireshark capture that indicating a unicast ARP request from source to destination. As per my understanding ARP requests (including gratutious ARP) use broadcast. In what case the unicast ...
Lunar Mushrooms's user avatar
5 votes
0 answers
5k views

Corosync unicast issue with different nets

I'm using a setup (on our staging-system) with 2 root-servers and 1 fail-over-ip. As software we use corosync and pacemaker. Corosync is configured for multicast communication via port 5405. --> ...
Rene Hellmann's user avatar
5 votes
2 answers
6k views

Switch Floods Packets that should be Unicast

I work as a Network Admin in a big company. Lately we noticed an issue with our network infrastructure. Basically our network backend lies on a Catalyst as main L3 backend switch, and few Cisco Nexus ...
amito's user avatar
  • 153
1 vote
1 answer
1k views

NLB Traffic Stops on all nodes when a single node is rebooted

We had a 2 node NLB cluster running IIS websites on virtual machines. Both nodes were online, the balancer functioned exactly as expected, (if traffic is 50/50 balanced, and you stop or drainstop a ...
I.T. Support's user avatar