[lacnog] DHCPv6

Fernando R. Soto frsoto en gmail.com
Mar Dic 27 12:37:00 -03 2022


Muchas gracias por la ayuda Uesley. 

 

El test lo estoy haciendo con una OLT Huawei en capa 3 y la ONT está en modo bridge. Con lo cual la q envía el RA es la OLT

 

Así esta configurado la interfaz vlan

 

OLT1(config-if-vlanif1010)#display this include-default 

{ <cr>||<K> }: 

 

  Command:

          display this include-default 

#

interface Vlanif1010

mtu 1500

description "CPE-PRIV"

undo shutdown

ip binding vpn-instance "VRF-NAT"

ipv6 enable

ip address 10.66.128.1 255.255.224.0

ipv6 address 2800:f91:760:20::1/64

ipv6 address auto link-local

ipv6 mtu 1500

undo ip verify source-address

static-route timer ldp-sync hold-down 10

undo mpls

undo ipv6 nd nud reachable-time

undo ipv6 nd ns retrans-timer

ipv6 nd ra Max-interval 600

undo ipv6 nd ra halt                           PARA Q ENVÍE LOS RA

undo ipv6 nd autoconfig managed-address-flag

undo ipv6 nd autoconfig other-flag

ipv6 nd dad attempts 1

ipv6 nd ra preference medium

ipv6 nd ra prefix default no-advertise          PARA Q NO UNUNCIE EL PREFIJO GUA POR EL RA

undo ipv6 nd ra advertised-mtu disable

dhcp-server 1

dhcpv6-server 1

#

return

 

 

 

De: LACNOG <lacnog-bounces en lacnic.net> En nombre de Uesley Correa
Enviado el: martes, 27 de diciembre de 2022 11:13
Para: Latin America and Caribbean Region Network Operators Group <lacnog en lacnic.net>
Asunto: Re: [lacnog] DHCPv6

 

Hola Fernando!

 

¿Ya probaste con /56? Ya he escuchado de routers que no aceptan recibir /48. Otro detalle: ¿hay algo de RA en esa interfaz de salida? Ya he visto routers en DHCP que, si no reciben informaciones por ND, no aplican / aceptan asignaciones por DHCP.

 

Saludos,




Uesley Corrêa - Analista de Telecomunicaciones

CEO Telecom Consultoria, Entrenamiento y Servicios

CEO Telecom Fiber Solutions

 

 

On Tue, Dec 27, 2022 at 10:57 AM Fernando R. Soto <frsoto en gmail.com <mailto:frsoto en gmail.com> > wrote:

Estimados, por favor una consulta

 

Levanté un DHCPv6 con Kea. Y veo que un router TP Link hace un Release de la ip y prefijo que le advierto. Como que no lo acepta porque algo no le gusta…  Como puedo saber que no le gustando o que le está faltando?

 

Slds cordiales

 

 

Este es el Advertise de mi  DHCP

Frame 6: 308 bytes on wire (2464 bits), 308 bytes captured (2464 bits)

Linux cooked capture v1

Internet Protocol Version 6, Src: 2800:f91:20::11, Dst: 2800:f91:760:20::1

User Datagram Protocol, Src Port: 547, Dst Port: 547

DHCPv6

    Message type: Relay-reply (13)

    Hopcount: 0

    Link address: 2800:f91:760:20::1

    Peer address: fe80::1aa6:f7ff:fe99:651d

    Interface-Id

        Option: Interface-Id (18)

        Length: 37

        Interface-ID: 4f4c5431504f5033382d50454c2078706f6e20302f31312f302f31323a34362e322e3130…

    Relay Message

        Option: Relay Message (9)

        Length: 165

        DHCPv6

            Message type: Advertise (2)

            Transaction ID: 0x4e9fda

            Client Identifier

                Option: Client Identifier (1)

                Length: 14

                DUID: 000100012b33000518a6f799651d

                DUID Type: link-layer address plus time (1)

                Hardware type: Ethernet (1)

                DUID Time: Dec 19, 2022 07:57:09.000000000 Hora estándar de Argentina

                Link-layer address: 18:a6:f7:99:65:1d

            Server Identifier

                Option: Server Identifier (2)

                Length: 14

                DUID: 000100012993e1f2000c299d6a9f

                DUID Type: link-layer address plus time (1)

                Hardware type: Ethernet (1)

                DUID Time: Feb  7, 2022 10:58:10.000000000 Hora estándar de Argentina

                Link-layer address: 00:0c:29:9d:6a:9f

            Identity Association for Non-temporary Address

                Option: Identity Association for Non-temporary Address (3)

                Length: 40

                IAID: 000207a2

                T1: 1000

                T2: 2000

                IA Address

                    Option: IA Address (5)

                    Length: 24

                    IPv6 address: 2800:f91:760:20::28e2

                    Preferred lifetime: 3000

                    Valid lifetime: 4000

            DNS recursive name server

                Option: DNS recursive name server (23)

                Length: 32

                 1 DNS server address: 2001:4860:4860::8888

                 2 DNS server address: 2001:4860:4860::8844

            Identity Association for Prefix Delegation

                Option: Identity Association for Prefix Delegation (25)

                Length: 41

                IAID: 000207a1

                T1: 1000

                T2: 2000

                IA Prefix

                    Option: IA Prefix (26)

                    Length: 25

                    Preferred lifetime: 3000

                    Valid lifetime: 4000

                    Prefix length: 48

                    Prefix address: 2800:f91:2091::

 

Y este es el Release

Frame 10: 233 bytes on wire (1864 bits), 233 bytes captured (1864 bits)

Linux cooked capture v1

Internet Protocol Version 6, Src: 2800:f91:760:20::1, Dst: 2800:f91:20::11

User Datagram Protocol, Src Port: 547, Dst Port: 547

DHCPv6

    Message type: Relay-forw (12)

    Hopcount: 0

    Link address: 2800:f91:760:20::1

    Peer address: fe80::1aa6:f7ff:fe99:651d

    Interface-Id

        Option: Interface-Id (18)

        Length: 37

        Interface-ID: 4f4c5431504f5033382d50454c2078706f6e20302f31312f302f31323a34362e322e3130…

    Relay Message

        Option: Relay Message (9)

        Length: 90

        DHCPv6

            Message type: Release (8)

            Transaction ID: 0x708205

            Client Identifier

                Option: Client Identifier (1)

                Length: 14

                DUID: 000100012b33000518a6f799651d

                DUID Type: link-layer address plus time (1)

                Hardware type: Ethernet (1)

                DUID Time: Dec 19, 2022 07:57:09.000000000 Hora estándar de Argentina

                Link-layer address: 18:a6:f7:99:65:1d

            Server Identifier

                Option: Server Identifier (2)

                Length: 14

                DUID: 000100012993e1f2000c299d6a9f

                DUID Type: link-layer address plus time (1)

                Hardware type: Ethernet (1)

                DUID Time: Feb  7, 2022 10:58:10.000000000 Hora estándar de Argentina

                Link-layer address: 00:0c:29:9d:6a:9f

            Identity Association for Non-temporary Address

                Option: Identity Association for Non-temporary Address (3)

                Length: 40

                IAID: 000207a2

                T1: 1000

                T2: 2000

                IA Address

                    Option: IA Address (5)

                    Length: 24

                    IPv6 address: 2800:f91:760:20::28e2

                    Preferred lifetime: 3000

                    Valid lifetime: 4000

            Elapsed time

                Option: Elapsed time (8)

                Length: 2

                Elapsed time: 0ms

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