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author | 2021-10-08 14:05:35 +0200 | |
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committer | 2021-10-13 23:22:20 +0000 | |
commit | f47122e07e1ecd0151902a3cabe46c60a99bee8e (patch) | |
tree | 0c28c0eca2cb17050d6f31fd8f0ca8f78299bf0d /src/plugins/dhcp/dhcp6_pd_doc.md | |
parent | 1e4281223ab4d655b54496ae13fbdb68f867e351 (diff) |
docs: convert plugins doc md->rst
Type: improvement
Change-Id: I7e821cce1feae229e1be4baeed249b9cca658135
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
Diffstat (limited to 'src/plugins/dhcp/dhcp6_pd_doc.md')
-rw-r--r-- | src/plugins/dhcp/dhcp6_pd_doc.md | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/src/plugins/dhcp/dhcp6_pd_doc.md b/src/plugins/dhcp/dhcp6_pd_doc.md deleted file mode 100644 index 0d0e0865f1b..00000000000 --- a/src/plugins/dhcp/dhcp6_pd_doc.md +++ /dev/null @@ -1,86 +0,0 @@ -# DHCPv6 prefix delegation {#dhcp6_pd_doc} - -DHCPv6 prefix delegation client implementation is split between Control Plane and Data Plane. -Data Plane can also be used alone by external application (external Control Plane) using Data Plane Binary API. - -Number of different IA\_PDs managed by VPP is currently limited to 1 (and corresponding IAID has value 1). -Client ID is of type DUID-LLT (Link Layer address plus time) and is created on VPP startup from avaliable interfaces (or chosen at random for debugging purposes). -Server ID is only visible to Data Plane. Control Plane identifies servers by a 32-bit handle (server\_index) mapped to Server ID by Data Plane. - -## Control Plane - -DHCPv6 PD clients are configured per interface. -When configuring a PD client we have to choose a name of a prefix group for that client. -Each prefix obtained through this client will be flagged as belonging to specified prefix group. -The prefix groups are used as a filter by prefix consumers. - -To enable client on particular interface call Binary API function dhcp6\_pd\_client\_enable\_disable with param 'sw\_if\_index' set to that interface, -'prefix\_group' set to prefix group name and 'enable' set to true. -Format of corresponding Debug CLI command is: "dhcp6 pd client <interface> [disable]" - -To add/delete IPv6 address potentially using available prefix from specified prefix group call Binary API command ip6\_add\_del\_address\_using\_prefix with parameters: -> sw\_if\_index - software interface index of interface to add/delete address to/from -> prefix\_group - name of prefix group, prefix\_group[0] == '\0' means no prefix should be used -> address - address or suffix to be used with a prefix from selected group -> prefix\_length - subnet prefix for the address -> is\_add - 1 for add, 0 for remove -or Debug CLI command with format: "set ip6 addresses <interface> [prefix group <n>] <address> [del]" - -When no prefix is avaliable, no address is physically added, but is added once a prefix becomes avaliable. -Address is removed when all available prefixes are removed. -When a used prefix is removed and there is other available prefix, the address that used the prefix is reconfigured using the available prefix. - -There are three debug CLI commands (with no parameters) used to show the state of clients, prefixes and addresses: - show ip6 pd clients - show ip6 prefixes - show ip6 addresses - -### Example configuration - -set int state GigabitEthernet0/8/0 up -dhcp6 pd client GigabitEthernet0/8/0 prefix group my-dhcp6-pd-group -set ip6 address GigabitEthernet0/8/0 prefix group my-dhcp6-pd-group ::7/64 - -## Data Plane - -First API message to be called is dhcp6\_clients\_enable\_disable with enable parameter set to 1. -It enables DHCPv6 client subsystem to receive UDP messages containing DHCPv6 client port (sets the router to DHCPv6 client mode). -This is to ensure client subsystem gets the messages instead of DHCPv6 proxy subsystem. - -There is one common Binary API call for sending DHCPv6 client messages (dhcp6\_pd\_send\_client\_message) with these fields: -> msg\_type - message type (e.g. Solicit) -> sw\_if\_index - index of TX interface -> server\_index - used to dentify DHCPv6 server, - unique for each DHCPv6 server on the link, - value obrtained from dhcp6\_pd\_reply\_event API message, - use ~0 to send message to all DHCPv6 servers -> param irt - initial retransmission time -> param mrt - maximum retransmission time -> param mrc - maximum retransmission count -> param mrd - maximum retransmission duration for sending the message -> stop - if non-zero then stop resending the message, otherwise start sending the message -> T1 - value of T1 in IA\_PD option -> T2 - value of T2 in IA\_PD option -> prefixes - list of prefixes in IA\_PD option - -The message is automatically resent by Data Plane based on parameters 'irt', 'mrt', 'mrc' and 'mrd'. -To stop the resending call the same function (same msg\_type is sufficient) with 'stop' set to 1. - -To subscribe for notifications of DHCPv6 messages from server call Binary API function -want\_dhcp6\_pd\_reply\_events with enable\_disable set to 1 -Notification (dhcp6\_pd\_reply\_event) fileds are: -> sw\_if\_index - index of RX interface -> server\_index - used to dentify DHCPv6 server, unique for each DHCPv6 server on the link -> msg\_type - message type -> T1 - value of T1 in IA\_PD option -> T2 - value of T2 in IA\_PD option -> inner\_status\_code - value of status code inside IA\_PD option -> status\_code - value of status code -> preference - value of preference option in reply message -> prefixes - list of prefixes in IA\_PD option - -Prefix is a struct with with these fields: -> prefix - prefix bytes -> prefix\_length - prefix length -> valid\_time - valid lifetime -> preferred\_time - preferred lifetime |