Snmp - Aastra NeXspan S Installation And Maintenance Manual

6.2.4 SNMP

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To manage a large network of RFP offers, an SNMP agent is provided for each RFP.
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The SNMP agent responds to SNMPv1, and SNMPv2c reads requests for the standard
MIB-II objects.
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The agent supports both SNMPv1 and SNMPv2c alerts ('coldStart' , 'nsNotifyShutdown' ,
'authenticationFailure' and 'nsNotifyRestart').
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Decoding SNMP messages with your network management system or MIB browser
always requires the publicly available IETF MIB definitions (see reference documents at
the beginning of the document), which can be downloadedErreur ! Aucun nom n'a été
donné au signet..
6.2.4.1.1 DHCP
REQUEST
6.2.4.1.2 V
ENDOR CLASS IDENTIFIER
The DHCP client sends the vendor class identifier 'OpenMobility'.
6.2.4.1.2.1 P
ARAMETER REQUEST LIST
The DHCP client in the booter requests for the following options in the parameter request list.
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Subnet mask option (code 1)
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Router option (code 3)
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Public option 224 (code 224)
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Public option 225 (code 225)
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Public option 226 (code 226)
6.2.4.1.3 DHCP
OFFER
The DHCP client selects the DHCP server according to the following rules:
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One of the public options (code 224 up to code 254) has a value equal to the
'OpenMobility' string. It is advisable to use public option 224 for this, because the
DHCP client in the application checks for this option.
Or
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the file field in the DHCP message has a sub string equal to 'ip_rfp.cnt'
If none of the two rules above match the DHCP, the offer is ignored.
Information retrieved from the DHCP offer:
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The IP address to use is taken from the yiaddr field in the DHCP message.
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The IP netmask is taken from the subnet mask option (code 1).
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