All MIBs › IP-MIB › ipv6IpDefaultHopLimit
ipv6IpDefaultHopLimit
Module: IP-MIB
OID (symbolic): IP-MIB::ipv6IpDefaultHopLimit
OID (numeric): 1.3.6.1.2.1.4.26
Node type: OBJECT-TYPE
Type: Integer32
Access: read-write
Description:
The default value inserted into the Hop Limit field of the IPv6 header of datagrams originated at this entity whenever a Hop Limit value is not supplied by the transport layer protocol.
When this object is written, the entity SHOULD save the change to non-volatile storage and restore the object from non-volatile storage upon re-initialization of the system.
What is ipv6IpDefaultHopLimit?
This object holds an unsigned integer (the MIB incorrectly labels it TimeStamp, but it should be a hop count 0-255) representing the default TTL inserted into outgoing IPv6 packets when the upper layer doesn't specify one. Lower values limit packet lifetime to nearby hops; higher values allow longer paths. An operator would adjust this when a device is unreachable beyond a certain number of hops: increasing from default 64 to 128 if valid traffic is being dropped by intermediate routers.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.4.26 snmpwalk -v2c -c public <target> IP-MIB::ipv6IpDefaultHopLimit
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.4.26.1 snmpget -v2c -c public <target> IP-MIB::ipv6IpDefaultHopLimit.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.2.1.4.26.1 i <value>