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Questions tagged [unicast]

15 questions
8
votes
2 answers

How to determine IP address is unicast or anycast?

I searched the Internet and unable to find an answer. Anyone can help?
John Wong
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7
votes
1 answer

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 ARP request is used ?
Lunar Mushrooms
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5
votes
0 answers

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. --> everything works fine. Now I want to deploy this…
Rene Hellmann
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5
votes
2 answers

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 switches as edge L2 switches, connected to that…
amito
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3
votes
1 answer

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 each other within that small switch. There is 1…
ugn
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2
votes
1 answer

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 guide so there will be only two VRRP…
HTF
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2
votes
1 answer

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 use a Virtual IP. Instead I'm attempting to use…
Chris Rosillo
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1
vote
1 answer

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 { member { …
Emre He
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1
vote
1 answer

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 node, all traffic routes seamlessles to the other…
I.T. Support
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1
vote
2 answers

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 WAN interface of my router (pfsense 2.5.2). I can…
supi007
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0
votes
2 answers

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. Is it possible to implement unicast only VXLAN…
A. Smith
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0
votes
2 answers

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 choose "unicast" cluster messaging mode. Also the…
user6123723
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0
votes
2 answers

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 on the third IP address ?
CBR
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0
votes
1 answer

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 destined to my laptop's IP only. For some reason,…
petiepooo
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0
votes
1 answer

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 fine when it tries to renew via unicast connection…
Janne Paalijarvi
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