Gitiles
Code Review Sign In
gerrit.opencord.org / dhcpl2relay / bd5ce9c2ac06972e5532e92fad4c8799289ecf4d
commitbd5ce9c2ac06972e5532e92fad4c8799289ecf4d[log] [tgz]
authorSaurav Das <saurav.das@opennetworking.org>Fri Sep 04 18:46:45 2020 -0700
committerSaurav Das <saurav.das@opennetworking.org>Fri Sep 04 19:03:05 2020 -0700
tree3a29468f96466f433effa2c1fbcbd1b6193945c6
parent3b7868d5d66bf4b604b7c62a6235884006934095 [diff]
Changing DHCP allocation map key to account for VLAN-id.

This way different services for the same subscriber, which have the same macAddress
but different vlanIds, won't overwrite each other. Allocations will also show the vlanId.
Also allocations were previously done only for DHCPACK for messages from the server.
Now updating allocations on all messages from dhcp-server.
Finally, updating unit tests to check dhcp-allocations, and cleaning up the logs by ignoring port-stats.

Change-Id: Ib48039ddcea0de7d3a60a7a6c43df40b932c4811
4 files changed
tree: 3a29468f96466f433effa2c1fbcbd1b6193945c6
  1. .gitignore
  2. .gitreview
  3. CODE_OF_CONDUCT.md
  4. README.md
  5. api/
  6. app/
  7. pom.xml
  8. spotbugs-security-exclude.xml
  9. spotbugs-security-include.xml
README.md

ONOS DHCP L2 RELAY Application

The ONOS dhcpl2relay application is a DHCP Relay Agent which does Layer 2 relay.

The DHCP packets sent towards the DHCP Server (DHCP DISCOVER and DHCP REQUEST) are double tagged by this app. It retrieves the tag values to be used from the Sadis Service. Similarly it replaces the tags on the packets received from the server (DHCP OFFER and DHCP ACK) with priority tags.

DHCP Option 82 with CircuitId and RemoteId are added to packets sent to the DHCP server and Option 82 received from the server are removed before relaying back to the client. The CircuitId and Remote Id are retrieved from Sadis Service.

There are two options to packet-in/packet-out to the DHCP Server.

  • To use a SDN controlled switch which can connect to the DHCP Server; using the configuration parameter dhcpserverConnectPoints
  • To use the uplink NNI port of the OLT (from which the DHCP Discover/Request was received) for doing the packet-out/packet-in; using the configuration parameter useOltUplinkForServerPktInOut

Configuration

"org.opencord.dhcpl2relay" : {
      "dhcpl2relay" : {
        "dhcpServerConnectPoints" : [ "of:00000000000000b2/2" ],
        "useOltUplinkForServerPktInOut" : true
      }
    }

Configuration Parameters

dhcpServerConnectPoints

Port on the switch through which the DHCP Server is reachable

useOltUplinkForServerPktInOut

The default value of this parameter is false. Only if this parameter is false the dhcpServerConnectPoints parameter is used else not

Example configuration of Sadis

   "org.opencord.sadis" : {
      "sadis" : {
        "integration" : {
          "cache" : {
            "enabled" : true,
            "maxsize" : 50,
            "ttl" : "PT1m"
          }
        },
        "entries" : [ {
          "id" : "uni-128", # (This is an entry for a subscriber) Same as the portName of the Port as seen in onos ports command
          "cTag" : 2, # C-tag of the subscriber
          "sTag" : 2, # S-tag of the subscriber
          "nasPortId" : "uni-128"  # NAS Port Id of the subscriber, could be different from the id above
        }, {
          "id" : "1d3eafb52e4e44b08818ab9ebaf7c0d4", # (This is an entry for an OLT device) Same as the serial of the OLT logical device as seen in the onos devices command
          "hardwareIdentifier" : "00:1b:22:00:b1:78", # MAC address to be used for this OLT
          "ipAddress" : "192.168.1.252", # IP address to be used for this OLT
          "nasId" : "B100-NASID" # NAS ID to be used for this OLT
        } ]
      }
    }