Does the RV180W support DHCPv6-PD?

[RobertHessenauer]

Hopefully a simple question.  Comcast has indicated that this is required for IPv6 to work, and since it means gatting a /64 address space for my network I am understandably eager to tak advantage of this new functionality when it is available in my area.

Thanks,

Robert Hessenauer                  

[jonatrod]

Good morning

Hi Robert Hessenauer

Yes,it does, here I leave a link to see the technical references of your product.

http://www.cisco.com/en/US/prod/collateral/routers/ps10907/ps9923/ps11996/c78-697399_data_sheet.html

I hope you find this answer useful, if it was satisfactory for you, please mark the question as Answered and rate the correct answer.

Best regards,

Johnnatan Rodriguez Miranda.

Cisco network support engineer.

[greenall]

Jonathan

          I have tried to actually get dhcpv6-pd working on the router and I have been unable to do so.   Just to make sure we're talking about the same thing.  With dhcpv6-pd the router should be requesting an IpV6 PREFIX from the ISP to use on the LAN side to assign to hosts.

          I see no way to do this using the configuration pages on the rv180w. I have looked over the technical reference you posted above and I do not see any reference to dhcpv6-pd.

          I have been able to setup the router to obtain a /128 HOST ipv6 address from the ISP, but this host address is pointless without obtaining a /64 prefix from the same isp from dhcpv6-pd to assign on the lan interface.

          I am work for the ISP in this case and am the person responsible for setting up ipv6 on the cable network so I can verify that dhcpv6-pd is working on the ISP side as I do have other routers that are doing this correctly.

           Could you please forward on any information on how dhcpv6-pd is configured on this router?

Richard Greenall

[greenall]

I hate responding to my own posting, but I just got off the phone will small business support and dhcpv6-pd is NOT supported on the rv180w (so it would not work with either my ISP, comcast, or another ISP that requires it)

Any chance of that support ever being added.  ITs a pretty common requirement of any cable ISP running ipv6

[jonatrod]

Good morning greenall

Sorry for not answer you immediately,about the  IP Wan settings you can follow  Tomas´ instructions.

However If this does not work, you can contact us for a better and quick attention.

https://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html

Thanks

Best regards,

Johnnatan Rodriguez Miranda.

Cisco network support engineer.

Message was edited by: Cindy Toy - Hello, I replaced your link with the correct link.

[RobertHessenauer]

I second the motion.  Right now I am on the hook for $400 in hardware that I was told WOULD do the job, oonly to find out after ourchase that it doesn't.

This is MAJOR as I cannot continue to waste precious $$ buying hardware.  If this router does support DHCPv6-PD, the please provide detailed instructions on how it must be configured on the WAN interface. If not, then when will there be a firmware update available that will resolve the issue and the instructions requested above. If neither, then please advise how Cisco is going to buy back both of the rv180w units I have in house and replace them (at minimal cost) with devices that provide all of the rv180w features (VPN, WDS, etc.) as well as DHCPv6-PD as was promised by small business support BEFORE I made the purchases.

(I just moved from a WRVS4400Nv2 / WAP44410N to be ready for Comcast's IPv6 transition, and called SB Support to help make the right purchase decision)

Please advise,

Robert Hesssenauer

[RobertHessenauer]

Juan,

I refer you back to the conversation at hand.  I CALLED Cisco SB and was TOLD that this device had the functionality in question.  Simply saying that it doesn't is NOT a solution at this point, I have spent $400 on TWO RV180W devices (since only another RV180W can be a WDS partner with an RV180W). As stated in my post 10/19/12 11:18PM, Cisco owns the problem since these were bought under the advice of your Small Businesss unit.  As such, the options are:

1. Buy back both units and replace them with a matched pair that DOES provide the functionality promised.

2. Provide a firmware update for these devices that adds the requested functionality (it can't be that hard - DLink already has it in their devices)

3. If the functionality can be enbled through configuration, provide detailed instructions as to how.

I await your reply, or an engineer that is willing to work the problem that YOUR Small Business Unit created.

Robert Hessenauer

[greenall]

Excuse me, but your reply originally stated it WAS supported. so now you change it after the fact to not supported with no explaination? Interesting how the date of your reply is now after my response

Incredibly unprofessional.

[Tom Watts]

Please reference the documentation

http://www.cisco.com/en/US/docs/routers/csbr/rv180w/administration/guide/rv180w_admin.pdf

Page 50-

Configuring IPv6 WAN Settings

Configuring WAN properties for an IPv6 network differs depending on which type

of Internet connection you have. See the sections below for detailed instructions.

The Cisco RV180/RV180W can be configured to be a DHCPv6 client of the ISP for

this WAN or a static IPv6 address provided by the ISP can be assigned.

Configuring DHCPv6

When the ISP allows you to obtain the WAN IP settings via DHCP, you need to

provide details for the DHCPv6 client configuration.

STEP 1 Choose IPv6 > IPv6 WAN (Internet).

STEP 2 In the WAN (Internet) Address (IPv6) field, choose DHCPv6.

STEP 3 Choose if the DHCPv6 client on the gateway is stateless or stateful. If a stateful

client is selected, the gateway connects to the ISP's DHCPv6 server for a leased

address. For stateless DHCP, it is not necessary to have a DHCPv6 server

available at the ISP. Instead, an ICMPv6 discover message will originate from the

Cisco RV180/RV180W and is used for auto-configuration.

STEP 4 Click Save.

-Tom
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[greenall]

Thomas.

       I have aleady done that and yes, that works.  I have a router with a /128 host address on the WAN.

       Not terribly useful though.   Can you think of one situation in IPv6 where it is useful to get a /128 host address on the wan with no dynamically assigned prefix for the lan?   Without supporting dhcpv6-pd having a dhcp client on the wan is pointless.

[RobertHessenauer]

I noticed this as well, as I also note that the answer was changed back again today.

Juan - The instructions provided only get the /128 address for the WAN side, it does NOT solve the problem at hand.  As noted on another discussion string, there are several of your HOME devices that DO have DHCPv6-PD functionality tested and running on the Comcast network.  Why does it make sense to LIMIT functionality of Business (read heartier and more expensive) devices to make this feature unavailable.

Thomas - I concur with grenall that your answer is not correct or complete.  Please read the entire post and know your subject matter fully before posting instructions that do not fully address the problem.

[Tom Watts]

Please read the documentation in it's entirety. I believe it is pretty well written and complete to this inquiry. I do offer my apologies if I suggested only the page 50 documentation is all of the documentation and I did not mention page 51.

Please carefully read "step 3" which is boldly highlighted

STEP 1 Choose Networking > IPv6 > IPv6 LAN (Local Area Network).

STEP 2 Under LAN TCP/IP Setup, in the IPv6 Address field, enter the IP address of the

Cisco RV180/RV180W. The default IPv6 address for the gateway is fec0::1. You

can change this 128 bit IPv6 address based on your network requirements.

STEP 3 Enter the IPv6 prefix length. The IPv6 network (subnet) is identified by the initial

bits of the address called the prefix. By default, the prefix is 64 bits long. All hosts

in the network have the identical initial bits for their IPv6 address; the number of

common initial bits in the network's addresses is set by the prefix length field.

STEP 4 In the DHCPv6 field, choose to disable or enable the DHCPv6 server. If enabled,

the Cisco RV180/RV180W assigns an IP address within the specified range plus

additional specified information to any LAN endpoint that requests DHCP-served

addresses.

STEP 5 Choose the DHCP mode. If stateless is selected, an external IPv6 DHCP server is

not required as the IPv6 LAN hosts are auto-configured by the Cisco RV180/

RV180W. In this case, the router advertisement daemon (RADVD) must be

configured on this device and ICMPv6 router discovery messages are used by the

host for auto-configuration. There are no managed addresses to serve the LAN

nodes.

If stateful is selected, the IPv6 LAN host will rely on an external DHCPv6 server to

provide required configuration settings.

STEP 6 (Optional) Enter the domain name of the DHCPv6 server.

STEP 7 Enter the server preference. This field is used to indicate the preference level of

this DHCP server. DHCP advertise messages with the highest server preference

value to a LAN host are preferred over other DHCP server advertise messages.

The default is 255.

STEP 8 Choose the DNS proxy behavior:

• Use DNS Proxy—Check this box to enable DNS proxy on this LAN, or

uncheck this box to disable this proxy. When this feature is enabled, the

router acts as a proxy for all DNS requests and communicate with the ISP’s

DNS servers (as configured in the WAN settings page).

• Use DNS from ISP—This option allows the ISP to define the DNS servers

(primary/secondary) for the LAN DHCP client.

• Use below—If selected, the primary/secondary DNS servers configured are

used. If you chose this option, enter the IP address of the primary and

secondary DNS servers.

STEP 9 Enter the lease/rebind time. Enter the duration (in seconds) for which IP addresses

will be leased to endpoints on the LAN.

STEP 10 Click Save.

Configuring IPv6 Address Pools

This feature allows you to define the IPv6 delegation prefix for a range of IP

addresses to be served by the Cisco RV180/RV180W’s DHCPv6 server. Using a

delegation prefix, you can automate the process of informing other networking

equipment on the LAN of DHCP information specific for the assigned prefix.

STEP 1 Choose Networking > IPv6 > IPv6 LAN (Local Area Network).

STEP 2 In the IPv6 Address Pool Table, click Add.

STEP 3 Enter the starting IP address and ending IP address of the pool.

STEP 4 Enter the prefix length. The number of common initial bits in the network’s

addresses is set by the prefix length field.

STEP 5 Click Save.

-Tom
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[greenall]

Thomas.

      How can I get past step 2, to even get to step 3.   Let us again review dhcpv6-pd..

      The prefix to use on the lan is dynamically assigned by the ISP.when the cpe makes a DHCP request to the server specifically requesting a prefix, not a host address.   The router is not issuing that request.  It is only issuing a host address request.

   the prefix is not the first /64 bits of the wan address.   That is not how dhcpv6-pd works, and that is not how a cable ISP works. The CMTS is required to sniff the dhcpv6-pd request the router makes and it will install a route in its routing table for the dynamic /64 assigned.   IF only the host dhcp address request is made, the cmts only installs a host route for the /128.   There is no assigned prefix for the lan.

      In several of the steps you posted, they depend on knowing what the lan prefix is (not the length, the actual prefix).  In Step 2 above, I am to enter in the prefix for the lan.  Again, kind of hard to put that information in if its dynamically assigned.

      I have opened a TAC case 623598157 and am supplying traces showing this.

Richard

[RobertHessenauer]

Richard,

If it helps with your case I have confirmed that several of the EA Home Gateways DO have this functionality (the EA-4500 specifically springs to mind).  It seems to me that it should be easy to steal the code and retrofit it into a firmware update as a feature add, but I am not certain.  Please keep me in the loop as your case moves forward as I am VERY interested in getting this resolved.

Here are some other devices where this is working correctly in the Comcast IPv6 implementation:

Linksys E1200 v2

Linksys EA-4500

Linksys E4200v2

Linksys E2500

I hope that we can get thsi resilved in an efficent and correct manner.

Robert Hessenauer

[Tom Watts]

Richard, please provide me a tele number, I want to call you.

Thanks.

-Tom
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