Orion A10E - Introduction; Loopback Detection

Orion Networks
A10E/A28E/A28F Configuration Guide
6 Security
Orion Networks
197
Step 4 Enable PPPoE+ on Port 1 and Port 2.
Alpha-A28E(config)#interface port 1
Alpha-A28E(config-port)#pppoeagent enable
Alpha-A28E(config-port)#exit
Alpha-A28E(config)#interface port 2
Alpha-A28E(config-port)#pppoeagent enable
Checking results
Show PPPoE+ configurations by the command of show pppoeagent [ port-list port-list ].
Alpha-A28E#show pppoeagent port-list 1-3
Attach-string: alpha-a28e
Circuit ID padding mode: switch
Port Enable Trust-port Overwrite Remote-ID Format-rules Circuit-ID
----------------------------------------------------------------
1 enable no enable switch-mac binary user01
2 enable no enable client-mac ascii %default%
3 disable yes disable switch-mac binary %default%
**In switch mode, Circuit-ID's default string is: Port\Vlan\Attach-string.
**In onu mode, Circuit-ID's default string is: 0 0/0/0:0.0
0/0/0/0/0/0/MAC 0/0/Port:eth/4096.CVLAN LN.
**Attach-string's default string is the hostname.
6.10 Loopback detection
6.10.1 Introduction
The interface loopback detection function solves the network effect, improves network error-
detection, error tolerance and stability.
Procedure of loopback detection:

Each interface of device sends loopback-detection message by interval (the interval is
configurable, by default: 4s).

The A10E/A28E checks source MAC field for interface received loopback detection
packets, if the source MAC is identical to device MAC, then some interfaces of the
device form a loop; otherwise, discard the message.

If the packets Tx interface ID is identical to Rx interface ID, shutdown the interface;

If the packets Tx interface ID is not identical to Rx interface ID, shutdown the interface
with bigger ID, and leave the smaller interface ID in Up status.
Common loop types are self-loop, internal loop and external loop.
As shown in Figure 6-13, Switch B and Switch connect user network.