NTSR Pool Configuration
Mode Commands
MME restoration is a
3GPP specification-based feature designed to gracefully handle the sessions
at S-GW once S-GW detects that the MME has failed or restarted.
If the S-GW detects an MME failure based on a different restart
counter in the Recovery IE in any GTP Signaling message or Echo Request / Response,
it will terminate sessions and not maintain any PDN connections.
As a part of this
feature, if a S-GW detects that a MME or S4-SGSN has restarted,
instead of removing all the resources associated with the peer node,
the S-GW shall maintain the PDN connection table data and
MM bearer contexts for some specific S5/S8
bearer contexts eligible for network initiated service restoration,
and initiate the deletion of the resources associated with all the
other S5/S8 bearers.
The S5/S8
bearers eligible for network initiated service restoration are determined
by the S-GW based on operator's policy, for example, based on the
QCI and/or ARP and/or APN.
The benefit of this
feature is that it provides support for the geo-redundant pool feature
on the S4-SGSN/MME. In order to restore session when the
MME receives a DDN, the S-GW triggers restoration when the serving
MME is unavailable, by selecting another MME and sending DDN. This
helps in faster service restoration/continuity in case
of MME/S4-SGSN failures.
Mode
This mode is
used to configure a pool of IP addresses associated with a pool
ID and pool type (either MME or S4-SGSN) for Network Triggered Service
Restoration (NTSR).
Exec > Global Configuration
> NTSR Pool Configuration
configure > ntsr pool
pool-id id > pool-type type
Entering the above command
sequence results in the following prompt:
[local]host_name(config-ntsr-pool)#
Important: The commands or keywords/variables
that are available are dependent on platform type, product version,
and installed license(s).
do show
Executes all
show commands while in Configuration mode.
Privilege
Security
Administrator, Administrator
Syntax
Syntax Description
do show
Usage Guidelines
Use this command to
run all Exec mode
show commands while in Configuration mode. It
is not necessary to exit the Config mode to run a
show command.
The pipe character
| is only
available if the command is valid in the Exec mode.
 Caution |
There are some
Exec mode
show commands which are too resource
intensive to run from Config mode. These include:
do show support
collection,
do show support
details,
do show support
record and
do show support
summary. If there is a restriction on a specific
show command, the following error message
is displayed:
Failure: Cannot execute 'do show support' command from Config mode.
|
end
Exits the current configuration mode and returns to the Exec mode.
Privilege
Security Administrator, Administrator
Syntax
Syntax Description
end
Usage Guidelines
Use this command to return to the Exec mode.
exit
Exits the current mode and returns to the parent configuration mode.
Privilege
Security Administrator, Administrator
Syntax
Syntax Description
exit
Usage Guidelines
Use this command to return to the parent configuration mode.
peer-ip-address
Configures a pool of IP addresses associated with a pool ID and pool
type (either MME or S4-SGSN) for Network Triggered Service Restoration (NTSR).
Privilege
Administrator, Security Administrator
Mode
Exec > Global Configuration > NTSR Pool Configuration
configure > ntsr pool pool-id
id
> pool-type
type
Entering the above command sequence results in the following prompt:
[local]host_name(config-ntsr-pool)#
Syntax
Syntax Description
[ no ] peer-ip-address { ipv4-address ipv4_address | ipv6-address ipv6_address
no
Removes the specified IP address configuration.
ipv4
ipv4_address
Specifies an IPv4 address to use with an associated NTSR pool ID and
pool type (either MME or S4-SGSN).
ipv6
ipv6_address
Specifies an IPv6 address to use with an associated NTSR pool ID and
pool type (either MME or S4-SGSN).
Usage Guidelines
Use this command to configure a pool of IP addresses associated with a
pool ID and pool type (either MME or S4-SGSN) for Network Triggered Service
Restoration (NTSR).
Before using this command, operators must configure an NTSR pool ID
and pool type by executing the
ntsr pool command in Global Configuration
Mode
Examples
To configure a an IPv4 address associated with a pool ID and pool type
(either MME or S4-SGSN) for Network Triggered Service Restoration (NTSR).
peer-ip-address ipv4-address 1.1.1.1