Questions tagged [link-local]

A link-local address is a network address that is valid only for communications within the network segment (link) or the broadcast domain that the host is connected to.

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Can fe80:: (IPv6 link-local) addresses communicate each other in the same host?

Let's suppose I have two network interfaces with one fe80:: address each one. 1: eth0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 link/ether ...
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Use ip6tables to forward traffic to setup DNAT/SNAT to link local address

I'm trying to use a raspberry to connect a terminal device to a VLAN. Basically I need to reach a device (that I cannot directly connect to a VLAN) remotely. My idea is to connect the device (via eth) ...
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how to find Link-local (APIPA) address of another computer which is directly connected to my PC

My task is to SSH into an embedded (linux) computer system from my PC. I have connected my PC directly to an embedded computer using LAN cable, both computers are configured to get IP address using ...
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1 answer
87 views

Link-local IPv4 network scope on Windows

We have an embedded PC that initially starts off life with a link-local IPv4 address, typically 169.254.0.1. It broadcasts its existence using Zeroconf using the python-zeroconf library. These ...
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Ping Hyper-V Virtual Switch IPv4

I wanted an IPv4 service running on the Hyper-V host that only the VMs can access via a Virtual Switch. Hyper-V Server 2016 (removed IPv6 public prefix) Ethernet adapter vEthernet (Public Switch): ...
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Unable to change link-local address for tunnel with iproute2

I have a couple of HE sit tunnels on Ubuntu 18.04 box. Only first one works as expected and I suppose the reason is almost same link-local addresses (generated from same MAC). What I'm trying is to ...
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How can I access a .local url for a virtual ubuntu server installation?

I recently installed ubuntu server on a virtualbox virtual machine. I tried to connect it using <host name>.local but it didn't work? How can I access it from a url but not an IP? (I do not ...
2 votes
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Can i disable link local IPv4 address assignment in route table Ubuntu 16.04 permanently

I am having trouble with disabling link local IPv4 address getting added in my routing table. So far i have uninstalled, avahi-daemon, commented out link-local 169.254.0.0 line in /etc/networks file ...
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2 answers
950 views

Windows Loopback adapter not participating in local network

I have created a Windows loop back adapter with 'Obtain IP address Automatically' enabled. ipconfig /all Ethernet adapter LL Address: Connection-specific DNS Suffix . : Description . . . . ....
1 vote
1 answer
459 views

Link Local Addressing - Communication with Routable Addresses

As per RFC 3927 it states that There will be cases when devices with a configured Link-Local address will need to communicate with a device with a routable address configured on the same physical ...
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1 answer
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Link Local Addressing

The RFC 3927 states that - "IPv4 Link-Local addresses are not suitable for communication with devices not directly connected to the same physical (or logical) link, and are only used where stable, ...
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1 answer
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Ping Link Local Address

We have an embedded networking device product which we first develop and test on Windows platform. It was observed that based on given conditions the device got a Link Local address - 169.254.106.235. ...
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2 answers
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Link Local Address and DHCP

If a networking device has attained Link Local Address and attains a Link Local Address - say - 169.254.111.135. Now if DHCP got enabled in the device and it acquires an IP from DHCP server in network ...
0 votes
1 answer
128 views

Link Local IP Address Method

I have a testing scenario where our device will be plugged into network without having a static IP and no DHCP server in the network. The aim is to create the scenario for the device to auto config ...
5 votes
1 answer
217 views

Is MS Windows known to be non-compliant to RFC3927 or did we hit a bug?

We have recently encountered a situation where a Windows 10 machine assigned itself a Local-Link address of 169.254.0.33. According to our reading of RFC 3927, section 2.1, this is not allowed. Ranges ...
2 votes
1 answer
5k views

How to manually set link-local address in Debian?

I'm trying to use manually assigned link-local addresses to have more meaningful routing tables. I disabled auto configuration for all interfaces in /etc/sysctl.conf net.ipv6.conf.all.autoconf=0 and ...
2 votes
1 answer
914 views

is the use of link-local address mandatory for IPv6 static routing next hop?

The RFC for Neighbor Discovery (RFC4861), in section 8 states: "A router MUST be able to determine the link-local address for each of its neighboring routers in order to ensure that the target ...
1 vote
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929 views

How to configure ntp server and chrony client for time sync over link-local IPv6

I have two computers connected with an Ethernet cable. The first computer, let's call it the "master" is also connected to the Internet via a wireless network. It's running ntp and getting its time ...
1 vote
1 answer
467 views

How to enable SSH to link-local address on ASA 9.1?

I have a Cisco ASA 5510, running ASA software version 9.1(7)16 on an IPv6 LAN. I want to enable SSH access, but I'm running up against the following warning: ciscoasa(config)# show ipv6 interface ...
2 votes
1 answer
416 views

Windows uses the wrong scope for link-local IPv6 addresses obtained from DNS

On Windows, I have two network interfaces with indexes 1 and 2 (according to route print). I want to ping a host reachable from interface 2 using an IPv6 link-local address, say, fe80::42. This works:...
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1 answer
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ipv6: low level technical explanation of Stateless address autoconfiguration

I have a clear understanding of broadcast, DHCP and general network configuration for ipv4. I'm looking for a low level technical explanation of network configuration for ipv6. Some of the terms that ...
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How to find all link local ipv6 devices on a certain interface?

We have a setup where a program on a linux server controls its linux subordinates (talks to them via TCP and UDP). There are several groups of subordinates. Each group is connected via ethernet to a ...
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4+ IP Address On New Network [closed]

So I just upgraded my ISP, and I went to set up the DMZ for the network. Upon setting the IPv6 DMZ, I ran ipconfig in CMD and this was the output: Connection-specific DNS Suffix . : hsd1.or.comcast....
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1 answer
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Is this IPv6-link-local address (as reported by Windows) correct? If so, why?

From what I read online, an IPv6 link-local address is generated by taking the network interface's MAC address, inserting an FF:FE word into the middle of it, OR'ing in some additional bits, et voila: ...
1 vote
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132 views

Delayed Ping of a link-local address with Windows 7/Server 2008 R2/Server 2012 R2

I have a strange effect here, which I do not understand. PS C:\Users\user1> ping fe80::219:bbff:fe0e:c600%16 -t Ping wird ausgeführt für fe80::219:bbff:fe0e:c600%16 mit 32 Bytes Daten: Zielhost ...
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2 answers
2k views

Can't discover a IPv4 link-local address when having an static IP configured

I have link-local addresses working out-of-the-box when coupled with DHCP, since when there's no DHCP, the device doesn't get an IP, only a link-local one. Still, I need to have link-local addresses ...
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8 votes
1 answer
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Apache (Linux) httpd listen on link-local IPv6 address

I would like Apache to listen on the link-local ipv6 address on a particular interface. I have the following line in my httpd.conf: Listen [fe80::a00:16ff:fe89:420f]:80 Which is based on the Apache ...
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3 votes
2 answers
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How to disable temporary IPv6 address in win7?

I found that the IPv6 link local address was generated randomly in Windows 7, not following the EUI-64 standard. Then I found this link and followed its guide: netsh interface ipv6 set global ...
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2 votes
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Why "scope link" ipv6 address can be pinged via interfaces which they are not active on

[root@2_01 ~]# /sbin/ip -6 addr show pubeth0 inet6 2001:1::6/64 scope global inet6 2001:1::1/64 scope global inet6 fe80::20c:29ff:fe69:f9e8/64 scope link [root@v2_01 ~]# /sbin/ip -6 addr show ...
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2 votes
0 answers
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How is the route scope parameter used?

I am confused about the route scope parameter in the output if /sbin/ip route. default via 10.32.10.1 dev wlan0 proto static 10.32.10.0/24 dev wlan0 proto kernel scope link src 10.32.10.154 ...
2 votes
3 answers
15k views

IPv6 hosts configure default route with router's link-local address

I have recently added IPv6 to our network as per the instructions at http://www.chronos-tachyon.net/reference/debian-ipv6-and-hurricane-electric. However, the hosts on the network automatically ...
1 vote
3 answers
2k views

Permanently assigning IP address for an embedded device

This is a follow-up to Embedded device configured with bad IP address, can I still connect? We make embedded devices that run Linux. Users can change the networking configuration of the device (...
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3 votes
1 answer
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Can't ping using IPv6 address

My network setup is very simple: two win7-64 machines connected to a switch. IPv6 enabled for their network interface. No router no outside network no DHCP. ipconfig report for the computer shows ...
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2 votes
1 answer
6k views

Disable inet6 link-local address from one interface

Anyone know how I can disable the link-local address from just one interface on CentOS 5.6? This is what I tried: root-> egrep -i ipv6 /etc/sysconfig/network-scripts/ifcfg-eth0 IPV6INIT=no ...
2 votes
4 answers
3k views

Unable to receive UDP packets from a link-local address [closed]

I have a program which attempts to contact to an embedded device over UDP. The embedded device has a link-local address only (169.254..); the Linux host has a normal (DHCP, RFC1918) address, managed ...
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5 votes
1 answer
8k views

IPv6 link-local routing

Link-local address: Routers do not forward packets with link-local addresses. What I want to know is: that makes sense if the destination is a link-local address, but what if I have a box that ...
18 votes
1 answer
44k views

Difference between link-local and global link addresses in ISATAP

What is the difference between link-local address and global link address in ISATAP? For example: link-local address: fe80::5efe:c000:0201 global address: 3ffe:b00:1:2::5efe:c000:0201 Why don't we ...
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2 votes
2 answers
6k views

How to find a rogue machine on your network with the wrong ip address

I'm continuing to lock down my network gear using the DISA standards. After implementing an ACL on a multi-layer switch that denies access to unknown subnets, the syslog server started recording two ...
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5 votes
2 answers
5k views

IPv6 can I use a link local address as my default Gateway?

can I set the default GW to be the Link Local address of the next hop router. I understand this is a strange thing to do, I'm mostly wondering it is possible?
18 votes
2 answers
62k views

What is a link-local address?

I could find some information on the Internet but it is hard for me to understand this information because of the use of technical words. Could somebody please help me with that. Did I correctly ...
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2 votes
4 answers
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How can I avoid Mac OS X temporarily setting its IP in the "link-local" range (169.254.x.x) at boot time?

I have a DNS and DHCP server (Linux machine) managing my LAN addresses and names. Everything is configured and fully working once the clients are up and running, having every Mac OS X client a DHCP ...
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