bgpPeergrTtlSecurityMinTtl

DC-BGP-MIB · .1.2.826.42.1.1578918.5.65.1.5.7.1.68

Object

column r/w SNMPv2-SMIInteger32
The minimum TTL (for IPv4) or Hop Limit (for IPv6) that
must be set in a BGP packet received from this peer.  This
field is used to enable the Generalized TTL Security
Mechanism (GTSM), as defined in RFC 5082.
              
If set to 0, then no restriction is applied to received
packets (that is, GTSM is not enabled).
              
If set to any other value, then packets received from a
peer with a TTL or Hop Limit less than the specified value
will be dropped.  A non-zero value also means that DC-BGP
will send packets to this peer with TTL set to 255, as
specified in RFC 5082.  This overrides the TTL value
specified in bgpPeerTtl or bgpPeergrTtl.
              
Note that the typical use case for GTSM is for directly
connected peers, where this field should be set to 254.
Non-directly connected peers may still use this feature,
with a lower value for this field, but the value must be
chosen such that changes in the network topology do not
cause packets to be dropped incorrectly.
              
This field can be changed at any time.  However, if a peer
is configured to use the peer group field and the field is
changed while the peer is active, depending on the setting
of the bgpPeergrResetPeerOnCfgChange field, the peer
session may either be immediately reset, or the
configuration change is not applied until the peer session
is restarted.

Context

MIB
DC-BGP-MIB
OID
.1.2.826.42.1.1578918.5.65.1.5.7.1.68
Type
column
Access
readwrite
Status
current
Parent
bgpPeergrEntry
Table
bgpPeergrTable
Siblings
69

Syntax

SNMPv2-SMIInteger32
Source
SNMPv2-SMIInteger32
Base type
Integer32

Values & Constraints

Type Constraints
range: -2147483648..2147483647

Related Objects

Sibling Objects