Alcatel-Lucent 7750 SR Manual page 1376

VPRN Service Configuration Commands
family
Syntax family [ipv4] [ipv6]
no family
Context config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Description This command specifies the address family or families to be supported over BGP peerings in the base
router. This command is additive so issuing the family command adds the specified address family to
the list.
The no form of the command removes the specified address family from the associated BGP
peerings. If an address family is not specified, then reset the supported address family back to the
default.
Default
ipv4
Parameters
ipv4 — Provisions support for IPv4 routing information.
ipv6 — Exchange IPv6 routing information.
hold-time
Syntax hold-time seconds [strict]
no hold-time
Context config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Description This command configures the BGP hold time, expressed in seconds.
The BGP hold time specifies the maximum time BGP waits between successive messages (either
keepalive or update) from its peer, before closing the connection. This configuration parameter can be
set at three levels: global level (applies to all peers), group level (applies to all peers in group) or
neighbor level (only applies to specified peer). The most specific value is used.
Even though the router OS implementation allows setting the keepalive time separately, the
configured keepalive timer is overridden by the hold-time value under the following circumstances:
The no form of the command used at the global level reverts to the default value.
The no form of the command used at the group level reverts to the value defined at the global level.
The no form of the command used at the neighbor level reverts to the value defined at the group level.
Default 90 seconds
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1. If the specified hold-time is less than the configured keepalive time, then the operational
keepalive time is set to a third of the hold-time; the configured keepalive time is not changed.
2. If the hold-time is set to zero, then the operational value of the keepalive time is set to zero; the
configured keepalive time is not changed. This means that the connection with the peer is up
permanently and no keepalive packets are sent to the peer.
7750 SR OS Services Guide