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Questions tagged [dhcpv6]

For questions about DHCP in IP version 6 in relation to network devices. For instance, you are setting up DHCP version 6 on a layer 3 switch.

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1answer
31 views

Why command “ipv6 dhcp relay” doesn't work at packet tracer?

I'm trying to enable dhcp for ipv6 with the "ipv6 dhcp relay dest" command but, I'm receiving an error and I'm trying both of these commands but none work. Router model: 2811 (config)# interface [...
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1answer
29 views

Does IPv6 Prefix Delegation work with SLAAC, without the need of a DHCPv6 server/client?

All the (cisco) documentation I found about this topic always uses a DHCPv6 server or client to configure Prefix Delegation. But I never read that this is a requirement. Can Prefix Delegation be ...
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1answer
417 views

How does router advertisement in IPv6 avoid IP conflict?

If a router advertisement sends the range of subnet, and the client can choose an IP from it, how is there no conflict with another client that has chosen the same address?
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1answer
637 views

“ssh: connect to host myserver port 22: Invalid argument” (intermittent, ipv6, link-local address, dhcp hostname) [closed]

Since this question is off-topic I moved it to Super User. But I was unable to delete it. Here is the new location. Here is the original question: I'm trying to connect to a headless server via my ...
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0answers
289 views

How to break apart an IPv6 /56 6rd delegated prefix from ISP into multiple /64 VLANs for use with SLAAC EUI-64? [Cisco]

I have CenturyLink Internet service, and they have a 6RD IPv6 deployment where they hand out an IPv6 delegated prefix /56 block to me and allow me to use it as I wish. My Cisco ISR router receives the ...
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2answers
393 views

no default-router option in dhcpv6?

I'm learning how to program a Cisco router with dhcpv6 and i saw that they never configure the default gateway address in the dhcpv6 configuration . Then how can the pc know what it's gateway address ...
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2answers
9k views

dhcpv6 - stateful VS stateless, what is difference between it?

Can someone explain me, what is difference between DHCPv6 Stateful and Stateless? I was looking on the net and, surprisingly, I found only the remains of information but some general comparison or ...
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2answers
372 views

Stateful DHCPv6 Default Router

I understand that stateful DHCPv6 cannot provide hosts with a default router, as DHCPv4 could. Hosts would need to determine the default router based off of the information in RA packets. In my lab, ...
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0answers
123 views

Huawei MA5683T OLT and PD IPv6

I am trying to give to my customers IPv6 prefix vía DHCPv6-PD. As IT is a FTTH Network, i configure the onts with DhcpV6-PD. The OLT is my relay agent to an ISC-DHCP-Server V6. The prefix is delegated ...
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1answer
422 views

How to configure a VLAN for all its client to get stateful IPv6 through a DHCPv6 server in the network on a Cisco C891F router?

Alright, so I've been trying this without any luck the whole day. How to configure a VLAN for all its client to get stateful IPv6 through a DHCPv6 server in the network on a Cisco C891F router? My ...
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1answer
169 views

assigning ULA and global adresses simultaneously

For my internal Network, i'd like to set up IPv6 with ULAs assigned with DHCPv6, a bit like with IPv4s RFC1918 private addresses: I'm independent from the Prefix of my ISP for the internal networking ...
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1answer
2k views

Method for assigning IPv6 ULA addresses to LAN

I'm finally embarking on the voyage that is IPv6. I am not sure however, on the best way of assigning a unique local address (ULA) to each host in my LAN. For IPv4 I prefer to have a DHCP server ...
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3answers
2k views

Should a router use SLAAC for IPv6 address assignment?

I am a little confused by the following 2 RFCs relating to IPv6: RFC 4862 (IPv6 Stateless Address Autoconfiguration) RFC 7084 (IPv6 CE Router Requirements) RFC 4862 states: The autoconfiguration ...
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2answers
279 views

Two IPv6 global unicast addresses on the same interface (stateless and stateful)

Can I assign two global unicast address to the same interface, one obtained via stateful addressing (DHCPv6) and the other one via SLAAC (eui-64)? According to the RFC-4862: Both stateless address ...
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1answer
35k views

Stateful vs Stateless IPv6?

What's the difference here? Are stateful IPv6 entries retained in the DHCPv6 server?
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0answers
160 views

Subnet delegated prefix on SRX

I configured a Juniper SRX firewall to receive IPv6 prefix from upstream router: family inet6 { dhcpv6-client { client-type statefull; client-ia-...
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0answers
265 views

DHCPv6 - When is the Status Code Option added to the options field of an IA Address Option?

I was wondering if someone would be able to tell me when is the status code option (OPTION_STATUS_CODE) added to the options field of a OPTION_IAADDR or OPTION_IAPREFIX (RFC3633). The RFC seems to ...
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1answer
189 views

content of dhcp lease-query message

Does the DHCPv6 LEASEQUERY-REPLY message contain the DUID (or MAC) of the client whose information we are requesting from the server?
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3answers
2k views

Is there an renew after the lease-time or after the half of the lease-time in DHCPv6?

Is there an address renew after the lease-time or after the half of the lease-time in DHCPv6 ? I´m not sure about, and I didn´t find that answer inside the RFC of DHCPv6.
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2answers
1k views

Can someone prove me why DHCPv6 needs DAD?

So recently I discovered DHCPv6 needed Duplicate Address Detection but why is that? I had a hard time researching on this topic, most answers is that because it needs first to check but I can't see ...
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2answers
3k views

IPv6 DHCP Server vs Router

I am setting up a testing environment for dualstack. I currently have a server (Windows 2008 R2), 2 switches and a router installed and configured. The server is the Primary Domain Controller and it ...
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4answers
3k views

DHCPv6 (with PD) client on Juniper SRX

OK, this one may technically be off-topic since I'm actually doing this at home, but I could easily see the exact same scenario arises in a small enterprise type of setup... Using an SRX210 to be a ...