Configuring Dual PPPoE

Configuration

Support for multiple PPPoE interfaces on a single node is configured as follows.

device-interface pppoe-dev-1
name pppoe-dev-1
type pppoe
target-interface dpdk3
pppoe
user-name user1
password passw0rd1
authentication-protocol chap
exit
network-interface pppoe-intf-1
name pppoe-intf-1
source-nat true
exit
exit
device-interface pppoe-dev-2
name pppoe-dev-2
type pppoe
target-interface dpdk4
pppoe
user-name user2
password passw0rd2
authentication-protocol chap
exit
network-interface pppoe-intf-2
name pppoe-intf-2
source-nat true
exit
exit

In the event of a disconnection, the failure section of show device-interface displays the ppd-exit-code and the ppd-exit-reason. The example below shows an authentication failure.

*admin@test1.Fabric128# show device-interface name pppoe-new
Fri 2020-05-15 17:29:02 UTC
=========================================================================
test1:pppoe-new
=========================================================================
Type: pppoe
Forwarding: true
Mode: host
MAC Address: 4e:b1:12:11:9e:fd
Admin Status: up
Operational Status: down
Redundancy Status: non-redundant
Speed: 0
Duplex: unknown
in-octets: 2942
in-unicast-pkts: 44
in-errors: 0
out-octets: 1050
out-unicast-pkts: 25
out-errors: 0
Error:
PPPoE State:
connection-status:ppp2 does not exist
failure:
attempt: 2
last-failure-time:Fri May 15 17:28:17 2020
next-retry-time:Fri May 15 17:33:17 2020
pppd-exit-code:19
pppd-exit-reason:We failed to authenticate ourselves to the peer.
Completed in 0.12 seconds

Reconnection Timer

In situations where there are several connection attempts (for example, consecutive authenication failures), logic is used to back off the reconnect attempts on specific failure codes. Failure codes and the intervals between reconnection attempts are configurable. Use the JSON file /var/lib/128technology/pppoe/{ppp<giid>}.init to specify the exit codes and adjust interval times. The defaults are shown in the example below.

After the first authentication failure (for pppd exit code 19), the intervals between each subsequent reconnect attempt will be 60s (1min), 300s (5min), 600s (10min), 1200s (20min), 2400s (40min), and 3600s (1hr). If the reconnect attempts continue after the sixth failure, the same interval time is used (3600s).

{
"backoff-intervals": [60, 300, 600, 1200, 2400, 3600],
"pppd-exit-codes": [19],
}

Connection Status using Linux

When the 128T is not running and the PPPoE connection is managed by linux, a pppoe-state utility is used to return the connection status. To use the utility, run pppoe-state ppp<giid> as shown below.

[root@t189-dut1 ~]# pppoe-state ppp2
{
"PPPoE State": {
"RX-OK": "7",
"TX-OVR": "0",
"Iface": "ppp2",
"TX-OK": "7",
"prefix": "32",
"MTU": "1492",
"RX-ERR": "0",
"TX-DRP": "0",
"TX-ERR": "0",
"RX-DRP": "0",
"address": "172.16.100.2",
"peer": "172.16.100.1",
"Flags": "PPP, RUNNING, PROMISCUOUS, UP, NOARP",
"RX-OVR": "0"
}
}
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