All MIBs › CIENA-CES-DHCP-RELAY-MIB › cienaCesDhcpRelayAgentReplaceOption82
cienaCesDhcpRelayAgentReplaceOption82
Module: CIENA-CES-DHCP-RELAY-MIB
OID (symbolic): CIENA-CES-DHCP-RELAY-MIB::cienaCesDhcpRelayAgentReplaceOption82
OID (numeric): 1.3.6.1.4.1.1271.2.3.6.1.1.4
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: Specifies whether or not the relay agent should replace an existing option 82.
What is cienaCesDhcpRelayAgentReplaceOption82?
Controls whether the relay agent overwrites an option 82 field that's already present in an incoming DHCP packet, rather than leaving it untouched. This matters in topologies where an untrusted downstream device (or a spoofing host) might have already inserted its own option 82 data -- with this set to on(1) the relay agent enforces its own trusted circuit/remote ID instead of passing through a value it didn't add. With this set to off(2), a DHCP packet arriving with a forged option 82 would be relayed with that forged data intact instead of being corrected.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1271.2.3.6.1.1.4 snmpwalk -v2c -c public <target> CIENA-CES-DHCP-RELAY-MIB::cienaCesDhcpRelayAgentReplaceOption82
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1271.2.3.6.1.1.4.1 snmpget -v2c -c public <target> CIENA-CES-DHCP-RELAY-MIB::cienaCesDhcpRelayAgentReplaceOption82.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.1271.2.3.6.1.1.4.1 i <value>
Start monitoring Ciena CES (Carrier Ethernet Switch) platforms with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the CIENA-CES-DHCP-RELAY-MIB::cienaCesDhcpRelayAgentReplaceOption82 OID value, configure state conditions and alerts, and monitor any Ciena CES (Carrier Ethernet Switch) platforms from a single console.
OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.1271 | ciena | CIENA-SMI |
| 1.3.6.1.4.1.1271.2 | cienaCes | CIENA-SMI |
| 1.3.6.1.4.1.1271.2.3 | cienaCesStatistics | CIENA-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1271.2.3.6 | cienaCesDhcpRelayMIB | CIENA-CES-DHCP-RELAY-MIB |
| 1.3.6.1.4.1.1271.2.3.6.1 | cienaCesDhcpRelayAgent | CIENA-CES-DHCP-RELAY-MIB |
| 1.3.6.1.4.1.1271.2.3.6.1.1 | cienaCesDhcpRelayAgentGlobalAttrs | CIENA-CES-DHCP-RELAY-MIB |
| 1.3.6.1.4.1.1271.2.3.6.1.1.4 | cienaCesDhcpRelayAgentReplaceOption82 | CIENA-CES-DHCP-RELAY-MIB |