Routers / Switches :: IPV6 Implementation In IPV4 Network

Jul 1, 2012

our company backbone is hp 5406, and desktop switches are hp 2510 currently we are working with ipv4.if we want to start use IPV6 for test environment, what’s things we need to enable in our backbone/regular switches.i mean for example if we want to set static IPV6 address for 2 servers and send ping between them, or even make new vlan with IVP6 subnet, and use it like regular vlan but with static ip's(until we got ipv6 dhcp).i have hp 5406 manual for IPV6 but i can't understand what i really need to do for start using IPV6.

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D-Link DIR-825 :: IpV4 Versus IpV6 Implementation For Remote Access And VPN?

May 16, 2013

 I currently have ipV4 as the setting on my DIR-825.   Other posts seem to want ipV6 which is more secure but is not possible with a DIR-825 Rev A1.  I have two routers, a primary router (DIR-825 Rev B1) capable of ipV6 and a secondary router (DIR-825 Rev A1).  If I implement ipV6 on the Rev B1 router but keep ipV4 on the secondary router, will this improve the security, or will it just mess things up so nothing works?Certain devices (cell phones and most Tablets) don't deal with ipV6 very well at all.   The ones I have tested flat don't connect to the wireless network if the router is set at ipV6. Is ipV4 adequate for a Home/Small Business Network when trying to implement Remote Access and VPN?

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Error / Ensure That Ipv4 And Ipv6 Are Selected In The Config For The Network Adapter

Aug 14, 2011

I'm working on a computer that has no connectivity on wired or wireless connections. the wired eth card is a broadcom netlink card and the wireless adapter is an atheros ar5007eg. I found the drivers for the wireless on and removed the driver that was on here at first and put the one from acer. i cant find a network in range but device manager says its working fine. Then I found out the wired connection isnt working either and im getting the same messages from windows troubleshooter. It says both are "experiencing driver or hardware related issues and "make sure your internet protocol bindings are correct - ensure that ipv4 and ipv6 are selected in the config for the network adapter". it links me to the connection properties and ipv4 and ipv6 are checked off for both. futhermore, in the connection status window it says i have no ipv4 or ipv6 connectivity.

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D-Link DIR-825 :: IPv6 Firewall Implementation

Apr 17, 2012

Unfortunately I didn't discover any configuration switches concerning an IPv6 firewall! So the important question is: Is there any firewall implemented at all? And if so, does it confirm to RFC6092.

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Cisco Switching/Routing :: IPv6 HSRP Implementation On IOS-XR 4.2.1

Nov 11, 2012

I'm looking to try and implement ipv6 HSRP on a series of IOS-XR Routers running 4.2.1 following on from successfully setting up IPv6 HSRP on a few cat6509s on VLAN Interfaces in other parts of the network. I have entered the "router hsrp" configuration menu and gone into the interface in question that I'm looking to setup with IPv6 HSRP. Unfortunately, there version 2 or address-family ipv6 commands are not available.

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DNS Not Working IPV4 IPV6 Not Connected?

Jan 11, 2013

has quite frankly gotten me absolutely annoyed . I've tried just about everything, from using the netsh commands to changing the dns to or that other one or the other. Nothing is working, I unplugged the router, problem persists, I disabled IPV6 problem persists, I restore, problem persists. The only clue I have is my router, and mysteriously, there are TWO of my computer on it. It might be nothing but most certainly has caught my attention. Also, it gives me this info about my media being disconnected

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Broadband :: IPv4 / IPv6 - No Internet Access

May 17, 2011

I am using window 7 on my laptop. I am using broadband internet (not wireless etc) via my external lan card but IPv4: IPv6: No Internet access shows.

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No Internet - Limited IPv4 And IPv6 Connection?

Aug 10, 2011

I have a dell inspiron 15 and I've been having trouble fully connecting to my wireless internet. It says I have signal but gets stuck on identifying the network and I have limited IPv4 and IPv6 connectivity.

Here's the ipconfig if you can identify the issue with it:

Windows IP Configuration
Host Name . . . . . . . . . . . . : M-PC
Primary Dns Suffix . . . . . . . :


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Cisco Security :: ACL Ipv4 And Ipv6 On Same Line Vty?

May 2, 2012

I've just want to confirm if I can protect a router (telnet and ssh) putting 2 ACL's (one IPv4 and other IPv6) on the same line vty. Something like:
line vty 0 4
access-class hostsIPv4 in
ipv6 access-class hostsIPv6 in 

Do I have to use named ACLs?

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D-Link DIR-615 :: Setup IPv6 In IPv4 Tunnel With Tunnerbroker Service

Mar 24, 2013

Recently I wanted to setup IPv6 for my home network. I signed up for service and was provided with IPs. Then I configured the IP address in my DIR-615. But It's not working..

Screenshot of IPv6 config (router) : Screenshot of my Win 8 network Config : I also tested at [URL] but failed...

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Cisco Firewall :: 5520 - Static Mapping On ASA From IPv6 To IPv4

Dec 7, 2011

ASA 5520 running 8.2
Is it possible to do static (inside,outside) with the outside address being IPv6 and the inside IPv4?
If yes, is it possible to do this in parallel with an existing static mapping that goes IPv4 to IPv4?

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D-Link DIR-825 :: Firmware 2.05NA - How To Get IPv6 In IPv4 Tunnel Working

Jun 9, 2011

I have a Dlink DIR-825 B1 with firmware 2.05NA.  I recently reset it to factory defaults to make sure I didn't misconfigure something.

I have been struggling to get a IPv6 in IPv4 tunnel working with  I think the issue is a problem with the router itself and i'm not sure how to get it fixed.

All of my machines were getting IPv6 addresses (both windows, mac, linux) but none of them seemed to work.  All I was able to do was ping the gateway itself using the local lan address.  In each case they were missing a default IPv6 route.  If I added a default route then it would work.

I started looking at the packets using a network sniffer and the Router Advertisements all had a Router lifetime value of "0" which is RFC4816 speak for "don't use this router as the default router".  So Windows/Linux is exactly right by not setting a default route.  

The strange thing was that when I reboot the router I would briefly get a router advertisement with a lifetime of 1800s, the corrert prefix and dns server but then another router advertisement would come along 5 seconds later with a router advertisement of 0.

I have TCP' Other observations

... using 6to4 I would get working IPv6 address.  The difference again seemed to be the Router Lifetime.  But I want to use a permanent tunnel.  I have found 6to4 unreliable.

... the router never responds to router solicitations.  It only sends a router advertisement when it wants to.

... the router never responds to DHCPv6 when that is configured.

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Cisco Firewall :: 3545 IPv6 Tunneling Through IPv4 - Blockage

Nov 3, 2009

Would like to learn from you what tools I could use in a Network that provides IPv6 visibility and also completely blocks IPv6 from being tunneled through ipv4 only networks.
I have tested this  from Linux running some internal penetration test apps,but specifically running Teredo tunneling in Local LAN that is able to completely bypass security paremeters such as websence filtering servers and be able to accessing internet IPv6 sites, even its equivalent IPv6 address based on its IPv4 PAT address could be pinged from outside..  is like the PIX firewall never existed  - wide opened door .
Blocking in outbound and inbound direction udp ports 3545 and 3544 seem to done the trick in dropping IPv6 at the PIX/ASA  from being tunneled out or in.. Is this so ? Realy ? not to fast!! None of our local systems - users PCs or servers have IPv6 stack enabled as a policy, however, in reality this poses a serious thread.
For example, Teredo tunneling running in a host inside LAN say by a user who is a hacker can use different  UDP ports from the standard listening udp 3545/3544 ports, host will still be able to tunnel IPv6 through IPv4 again, in this case I want to have  tool or a strategy that can detect this internally beside being blocked at the firewall, I am looking at AIP for our ASAs would this help?  What other tools could I utilized to have some sort of IPv6 awareness in our LAN without having to rung IPv6 that can provide some visibility of this invisible traffic in IPv4 LANs.

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Cisco :: Ipv6 / Ipv4 Fragmented Packet - How To Prevent It In Router Part

Jan 1, 2013

i got trouble for this ipv4 & ipv6 fragment trafic prob/ do i prevent it from comming in to my network? is it way to prevent it in cisco router part?

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Linksys Wireless Router :: EA4500 Loses IPv4 And IPv6 Information?

Dec 21, 2012

No changes made but router will lose all information for IPv connectivity.  I have paid twice to support to fix this issue and it still occurs every few months. I tried rebooting router, and doing an IP Release/ Renew and router does not get IP address.

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Linksys Wireless Router :: EA4500 - Translate Ipv4 Address And Port To Ipv6?

Nov 9, 2012

I have a virtual machine running in my desktop which connected on the gigabit lan port on EA4500 with firmware 2.0.37.What I want to be able to do forward a port that came from an external ipv4 address to the ipv6 address and a different port to my virtual machine (to remote desktop port 3389).The reason I want to convert the traffic to ipv6 is because virtual machine is running vpn and is not reacheable through ipv4 (unless bunch of routes are setup and things get complicated etc). I verified my phsical server and virtual server get both ipv6 ip addresses through ipv6 tunnel from comcast. Without tunneling I could not get ipv6 setup using automatic mode with comcast, it simply did not work for some reason.

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Routers / Switches :: What Is Protocol 41 With Ipv6

Aug 26, 2011

Protocol 41 with ipv6

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Routers / Switches :: How To Format IPv6

Feb 6, 2011

want to know how to format IPv6

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Routers / Switches :: How To Implement Ipv6 On Windows 7

Feb 10, 2011

How to implement ipv6 on windows 7

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Can Pure IPv6 Host Ping A IPv4 Host?

Feb 10, 2011

I'm just wondering if its possible to ping an IPv4 host using the IPv6 host assuming that the NAT64 has already been implemented?

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IPv4 Connected To Internet But IPv6 No Internet Access?

Apr 22, 2011

well a couple days of go it was working fine until i updated windows 7 now it says im connected to the internet but when i go on it dosnt load anything, and when i go check it says that "IPv6 connectivity: No Internet access" how ever the IPv4 is connected to the internet, should i restore settings to osmetimes earlier this week

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Internet Connectivity IPv4 Internet - Ipv6 - Local

May 21, 2011

My laptop is not connecting to the internet, I know that it is not a router problem as my mine PC and Notebook are connecting with no issues.I have removed all router devices as had an new once once it was last working.I tried this morning to set it up again without success. I have compared to setting with my pc and have found the difference is with the IPV6 connectivity.

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Cisco Switches :: Voice VLAN Implementation On SGE2000P

Sep 17, 2011

I'm planning to separate voice and data traffic with two vlans.  I have a COR switch catalyst 3750, a UC560 for VOIP with SIP trunk and SGE2000P as access switches.  The thing is i had configured VLAN1 (data vlan) and VLAN8 (voice vlan), i've created the vlan 8 in the database on 3750 and let pass those vlans through a TRUNK port.  In the SGE2000P configuration i've created the VLAN8 and the the ports as trunk for letting pass the two vlans for the PC and the IP phone.  This works but some phones aren't registering, and for example i've unplugged a register phone and plug and doesn't registering anymore. 

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Cisco Switches :: SG300-10 IPv4 Routes Bug?

May 10, 2013

I bought the SG300-10 Switch a few days ago and updated it to firmware, but i think there's a bug in this firmware. If I go to "IP Configuration" IPv4 Routes" in L3 Mode nothing is displayed. In the log file i see that:
21474773112013-Mar-16 09:51:34Error%HTTP_HTTPS-E-DIAGNOSTICS: ERROR - in <RL_vtLeadTableGet> tag, can not find the table rlInetRoutingDistanceTable in the MIB.       21474775182013-Mar-14 22:39:22Error%HTTP_HTTPS-E-DIAGNOSTICS: ERROR - in <RL_vtLeadTableGet> tag, can not find the table rlInetRoutingDistanceTable in the MIB., aggregated (1)               
Reset of the Switch doesn't work.

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Cisco Switches :: SG200-08 (SLM2008T-EU) IPv4 Packet Loss

May 11, 2011

I recently bought a SG200-08 8-port gigabit switch. The switch firmware is the latest ( Everything works fine, except that packet loss I have when flood-pinging on the LAN.
I have 3 machines connected to the switch, they have 1000 full duplex links, they all have Ubuntu Linux installed on them, no limiting on the switch (as far as I can tell), no limiting on the machines (nothing like htb, cbq), no QOS set up on the switch, the machines are fairly OK hardware-wise (dual-core, quad-core, six-core). And still, it doesn't matter which way I ping, I get a consistent packet loss of 5-7% when flood pinging:
gimre@voy:~$ sudo ping -n -f -c 10000 -q
PING ( 56(84) bytes of data.
--- ping statistics ---
10000 packets transmitted, 9247 received, 7% packet loss, time 14944ms
rtt min/avg/max/mdev = 0.036/0.062/0.290/0.035 ms, ipg/ewma 1.494/0.051 ms

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Cisco Firewall :: 5515x Apply On Firewall / Switches To Make Implementation Successful

Apr 22, 2013

I will be implementing a new firewall (cisco asa 5515x) on my existing  3750x (server switches) and my 2960s (user switches). What should I need to apply on my firewall and swtiches to make the  implementation successfull.  I will put my 3750x as my DMZ and my 2960s  as my inside.  The 3750x have multiple subnet and also the 2960s.which  features and technologies i need to know on those 3 products.  my 3750x  and 2960s don't have any ACL defined and most common features are vlan,  switchport, trunking, spanning-tree, stacking,  my asa knows that my 3750x/2960s have multiple vlans.  my current  connection right now on 3750x and 2960s is just through 6 ports i  assigned as one trunk, below is my config [code]

my  2960s vlans are almost the same with my 3750x except vlan 160, 170,  192.  but of course when i put this in asa, i have to segragate vlan for  3750x (192, 100, 110,160, 170) and 2960s (130, 150).  for my 2960s  connection to the asa and since this will have big bandwidth, i will use  3 ports on my asa (and trunk it) connecting to my 2960s and i will use 2  ports on my asa (and trunk it) connecting to my 3750x.  the one  internet ports and my one management ports on my asa will stay like  that.

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Cisco :: VLAN Implementation To Live And Running Network?

Mar 27, 2012

Just wanted to get a few answers in regards to VLAN implementation (thinking about doing this for a large network)...VLAN's always sound good on paper, but how hard/easy are they to implement to a live and running network?

1.) Have successfully implemented VLAN's into a production environment (e.g. placed servers, production, printers, etc. on separate VLAN's)?

2.) How much of a pain is it to do this? If you are on a 192.168.1.x subnet, do you have to re-IP all of your printers, switches, etc. This sounds like a lot of work – especially since re-IP’ing domain controllers is a royal pain.

3.) Have you seen much of a performance increase when implementing VLAN’s (i.e. chatty protocols and broadcasts?)

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Cisco Routers :: WRVS4400N Disable IPV4 DHCP Server

Jun 3, 2013

The operation steps on router (WRVS4400N):

1.Set the IP mode as Dual-stack IP and then save
2.Disable the IPV4 DHCP server
3.Use other deivces to connect the router.

The connected devices have the same IP address(2005:123:456:789::1),I am confused,why is it?

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Home Network :: Topologies In Real Time Implementation Compare And Contrast Each Other

Apr 26, 2011

Topologies in real time implementation compare and contrast each other?

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Routers / Switches :: Setup An Home Network With A Wireless Router And Use Multiple Switches?

Jan 29, 2011

I want to setup an home network with a wireless router and use multiple switches for wired connections through out my home. I currently have an Airport extreme hooked up to a cable modem and a leviton gateway hooked up to the Airport. The 2 computers connected to the Leviton are on a windows 7 homegroup and share fine, but won't share or discover any wireless device connected to Airport. My main goal is to have a wireless/wired network with all computers sharing information with each other. I want 2-3 wired switches/gateways with a min of 2 devices connected to each, connected to my wireless router whiich is connected to cable modem.

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Windows 7 Pro 32 Cannot See Network And Won't Honor Static IPv4?

Mar 16, 2012

We set up three new terminals this week at the office; they're all running Win 7 Pro 32-bit. I set them all up simultaneously (literally sat at a desk and entered the same keystrokes at each of them), so I don't see any obvious reason that one is behaving differently from the other two. The essential problem is that the terminal doesn't see the Internet.

Here are all the particulars that I think might be interesting, listed in no particular order:

- The terminal ran fine for several hours. Email access, Internet access, from 9 a.m. to 2 p.m. At that point, the user called me to show me a dialog box. I used System Restore to go back in time to 9 a.m. in case the user had somehow managed to do anything (though she's not an admin).

- IPv6 is disabled.

- The workplace uses Static IPs. The IP address is entered correctly in the IPv4 properties (x.x.x.213), but at cmd / ipconfig, I get this result: "Autoconfiguration IPv4 address:"

- In Network and Sharing Center, the network (which is only known as Unidentified Network) is set to type Public. When I reset it to type Work and reboot, it resets to type Public.

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Can't Connect To Network Without Manual Ipv4 Settings

Jun 13, 2012

A few months back, my computer stopped connecting to networks. Through some process or another, I ended up "fixing" it by manually inserting the ipv4 settings. Apparently that only allows it to connect to my router though, as public wi fi won't work for it. If I leave the ipv4 settings set to automatically obtain information, the computer won't connect to the network. It will stay on the "identifying network" part indefinitely. In addition, I can't connect through the modem directly either, manual settings or not.

Here is the ipconfig while ipv4 is in auto-obtain

Windows IP Configuration
Host Name . . . . . . . . . . . . : Home
Primary Dns Suffix . . . . . . . :


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Cisco Switches :: SOHO97 / 800 - Unable To Support IPv6

Dec 7, 2010

I've got older SOHO97 which I want to use as a backup for Cisco 800  but I can not find any information if it actually supports IPv6. Neither the data sheet [URL] nor the Cisco Feature Navigator [URL] suggest it has any IPv6 support at all.

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