| OID symbolic | OID numeric | Type | Access | Description |
|---|
| ciscoItpRtMIB | 1.3.6.1.4.1.9.9.228 | | | This MIB is for managing information required to
route messages transported over Signalling System
No. 7 (SS7) Network via Cisco IP Transfer
Point.
The Cisco IP Transfer Point (ITP) is a hardware
and software solution that transports SS7 traffic
using IP. Each ITP node provides the functions
necessary to act as a SS7 signalling point. Each
signalling point is connected to other signalling
point using IP based or traditional TDM links.
The relevant ITU documents describing this technology
are the ITU Q series, including ITU Q.700: Introduction
to CCITT Signalling System No. 7 and ITU Q.701
Functional description of the message transfer part
(MTP) of Signalling System No. 7.
Definitions and overview:
Route:
A route consists of one or more linksets used to transport
MTP3 Message Signal Units(MSU) between signalling points.
A route is an association between a destination point
code(DPC) and a linkset, i.e., a linkset that can be used
to send an MSU to the given DPC.
Routeset:
A routeset is a set of routes to a given DPC. Each route
within a routeset is on a possible path toward the DPC.
Each route within the routeset has associated with it a
route priority.
In the following simple configuration, two routes exist
that can be used to transport MSUs from STP1 to STP4.
--------- STP1-STP2 ---------
- STP1 ----------------------------- STP2 -
--------- ---------
| |
| STP1-STP3 STP2-STP4 |
| |
--------- STP3-STP4 ---------
- STP3 ----------------------------- STP4 -
--------- ---------
Routeset on STP1 for DPC = STP4:
STP1-STP2,
STP1-STP3
Linkset:
A linkset is a set of signalling links connecting
two signalling points.
Combined Linkset:
Two linksets with equal number of links and capacity
that form routes of equal priority to a given DPC are
called Combined Linksets. It is primarily used for
load sharing and redundancy. In the following, example,
linksets 'SSP1-STP1' and 'SSP1-STP2' form a combined
linsket.
SSP1-STP1 ---------
|------------------------- STP1 -
| ---------
- -
- -
- SSP1 -
- -
- -
| SSP1-STP2 ---------
|------------------------ STP2 -
---------
Routing:
The routing of SS7 Message signalling Units(MSU) is based
on the DPC. Message Signalling Units are sent from an
originating point code(OPC) to DPC. Each MSU will
traverse one or more linksets as it is routed to its
final destination. When an MSU arrives at a signalling
point and the DPC does not match the signalling point's
point code the MSU must be directed toward the DPC. Each
signalling point has enough routing information to
determine which linkset should be used to transmit the
MSU toward its final destination.
Route statement:
Each ITP Signalling Point has route statements needed to
determine which linkset should be used to transmit
message signalling units to destinations. Each route
statement consists of a destination, a priority and a
linkset name. The destination is specified as a
combination of DPC and mask. The priority, also know
as cost, is used to define the order in which the routes
are selected. The linkset name specifies which linkset
to use to reach the destination.
Route table:
Each ITP Signalling Point has a table of routes.
These route entries are used to determine which linkset
should be selected to transmit message signalling units
to a given destination.
There are two basic type of routing. The first type
is fully-qualified and uses all bits of the target DPC.
The other type is summary routing that uses a subset
of the bits in the target DPC and is used to represent
groups of point codes rather than a single point code.
Example of route table entries.
Example 1: variant = ITU
DPC/MASK Priority Linkset-name
-------- -------- -----------------------
5.5.5/14 3 STP1-STP2
5.5.5/14 7 STP1-STP3
Description: Two route table entries that define a
primary route using linkset 'STP1-STP2' and an alternate
route using linkset 'STP1-STP3' to point-code 5.5.5.
Example 2: variant = ITU
DPC/MASK Priority Linkset-name
-------- -------- -----------------------
5.5.5/14 3 STP1-STP2
5.5.5/14 3 STP1-STP3
5.5.5/14 7 STP1-STP4
Description: Two route table entrys that define a
combined linkset consisting of linkset 'STP1-STP2' and
'STP1-STP3' to point code 5.5.5. An alternate route is
also defined using linkset 'STP1-STP4'.
Example 3: variant = ANSI
DPC/MASK Priority Linkset-name
-------- -------- -----------------------
5.5.0/16 3 STP1-STP2
Description: A route table entry that defines routing
to a cluster. The cluster represents all point codes
in the range from 5.5.0-5.5.255.
Example 4: variant = ANSI
DPC/MASK Priority Linkset-name
-------- -------- -----------------------
5.5.0/16 3 STP1-STP3
5.5.5/24 3 STP1-STP2
Description: The mixing of fully-qualified and summary
route table entrys allow for different routes to be
defined for certain DPC in a cluster. In this
configuration, the fully-qualified route will be the
primary and the summary route will act as a backup.
Route table:
A group of route table entrys used to route MSU for a
particular instance of a signalling point.
A sample route table.
DPC/MASK Priority Linkset-name
-------- -------- -----------------------
0.0.0/0 7 STP1-STP4
5.5.0/16 3 STP1-STP3
5.5.5/24 3 STP1-STP2
.
.
122.5.5 5 STP1-STP2
.
.
243.200.1 6 STP1-STP3 |
| cItpRouteNotifications | 1.3.6.1.4.1.9.9.228.0 | | | |
| NTF cItpRouteStateChange | 1.3.6.1.4.1.9.9.228.0.1 | | | This notification is generated whenever one or more
route destination status changes states and includes
the count of all route state changes. This
notification contains a list of route state changes
in the cItpRtNotifInfoStateChanges object. State
changes are accumulated until the
cItpRtNotifInfoStateChanges is full or the maximum
delay time is reached. The delay time is specified
by the cItpRtChangeNotifDelayTime object.
It may be necessary to suppress the sending of
notification when a large number route change
state, due the failure of some common resource.
The number of notifications can be controlled by
specifying values for cItpRtChangeNotifWindowTime
and cItpRtChangeNotifMaxPerWindow objects. When the
number of route state changes exceed the specified
value the last notification will indicate that
notifications are suppressed for the remainder
of the window. |
| cItpRtMIBObjects | 1.3.6.1.4.1.9.9.228.1 | | | |
| cItpRtScalars | 1.3.6.1.4.1.9.9.228.1.1 | | | |
| TIM cItpRtConfigLastChanged | 1.3.6.1.4.1.9.9.228.1.1.1 | TimeStamp | read-only | The value of sysUpTime at the time of the last
creation or deletion of an entry in the cItpRouteTable.
If the local network management subsystem is
re-initialization, then this object contains the
sysUpTime at the time when this occurred. This value
can be used to prevent unnecessary walks of the
cItpRouteTable. |
| TIM cItpRtConfigLoad | 1.3.6.1.4.1.9.9.228.1.1.2 | TimeStamp | read-only | The value of sysUpTime at the time of the last
load of the route table using file format. |
| CIT cItpRtConfigLoadStatus | 1.3.6.1.4.1.9.9.228.1.1.3 | CItpTcTableLoadStatus | read-only | The status of the current load or status from
the prior load operation. This object will have
a value of loadInProgress while the load operation
is in progress. The cItpRtConfigLoad contains
a timestamp indicating when the load operation
completed. |
| C32 cItpRtStateChangeCount | 1.3.6.1.4.1.9.9.228.1.1.4 | Counter32 | read-only | A count of the number of routes that have changed
states. This value is incremented whenever the
destination state of a route changes.
This value is used to provide an indicator
of the stability of the routing table information. |
| T/F cItpRtStateChangeNotifEnabled | 1.3.6.1.4.1.9.9.228.1.1.5 | TruthValue | read-write | A control to enable or disable cItpRouteStateChange
notifications as follows:
'true' Indicates that the cItpRouteStateChange
notification should be generated when the state
of any route changes. That is, the notification
generation is enabled.
'false' Indicates that cItpRouteStateChange
notification generation is disabled. |
| U32 cItpRtChangeNotifDelayTime | 1.3.6.1.4.1.9.9.228.1.1.6 | Unsigned32 | read-write | This object specifies the maximum amount of time to delay
before generating the cItpRouteStateChange notification.
The delay is introduced to allow multiple route state
changes to be bundled into a single notification.
If the value of this object is equal to 0, the device will
generate cItpRouteStateChange notification as each route
changes states.
If the value of this object is greater than 0, the device
will not generate notifications as routes change state.
As routes changes state they are accumulated until the time
specified in cItpRtChangeNotifDelayTime has elapsed or
enough state changes have been accumulated to fill up the
cItprtNotifInfoStateChanges object.
This object is ignored by the agent when the
cItpRtStateChangeNotifEnabled object is set to the 'false'
value. |
| I32 cItpRtMaxDynamicRoutes | 1.3.6.1.4.1.9.9.228.1.1.7 | Integer32 | read-write | The maximum number of dynamic SS7 routes. This
object is used to limit the size of the route table
by preventing unbounded growth of dynamic entries.
Dynamic entries are created when certain MTP3
management messages are received or sent. The removal
of dynamic routes is performed periodically and the
older dynamic routes are removed until the specified
number is reached. |
| I32 cItpRtChangeNotifWindowTime | 1.3.6.1.4.1.9.9.228.1.1.8 | Integer32 | read-write | This object specifies the time interval used to monitor
the rate of route state changes notifications. This object
in combination with cItpRtChangeNotifMaxPerWindow are used
to determine the notification transit rate and suppress
route state notifications. |
| I32 cItpRtChangeNotifMaxPerWindow | 1.3.6.1.4.1.9.9.228.1.1.9 | Integer32 | read-write | This object specifies the maximum number of route
state changes that can occur in the time interval
specified in the cItpRtChangeNotifMaxPerWindow
object. If additional state changes can occur in
the specified time interval the notifications
are suppressed. |
| cItpRtTables | 1.3.6.1.4.1.9.9.228.1.2 | | | |
| cItpRouteTable | 1.3.6.1.4.1.9.9.228.1.2.1 | | not-accessible | The route table for determining the linkset that a
packet must traverse to arrive at its destination node
given by the destination point code. |
| cItpRouteTableEntry | 1.3.6.1.4.1.9.9.228.1.2.1.1 | | not-accessible | Each table entry represents a configured route
statement. |
| CIT cItpRouteTableName | 1.3.6.1.4.1.9.9.228.1.2.1.1.1 | CItpTcRouteTableName | not-accessible | The configured name for this route table. |
| NUM cItpRouteDpc | 1.3.6.1.4.1.9.9.228.1.2.1.1.2 | CItpTcPointCode | not-accessible | The destination point code. |
| U32 cItpRouteDestLsCost | 1.3.6.1.4.1.9.9.228.1.2.1.1.3 | Unsigned32 | not-accessible | The cost assigned to this linkset matching this
route. Higher numbers represent higher cost. |
| CIT cItpRouteDestLinkset | 1.3.6.1.4.1.9.9.228.1.2.1.1.4 | CItpTcLinksetId | not-accessible | The linkset that the packet is to be forwarded to on
matching this route. |
| U32 cItpRouteMask | 1.3.6.1.4.1.9.9.228.1.2.1.1.5 | Unsigned32 | not-accessible | The mask used to define which part of
cItpRouteDpc is significant when comparing
the cItpRouteDpc to the destination code
point in the packet to be routed. |
| CIT cItpRouteQos | 1.3.6.1.4.1.9.9.228.1.2.1.1.6 | CItpTcQos | read-only | The quality of service classification to be assigned
to the ip packets used to transport the SS7 messages.
The value to specify for packets
when they will be transported on SCTP/IP based
linkset. |
| INT cItpRouteStatus | 1.3.6.1.4.1.9.9.228.1.2.1.1.7 | INTEGER | read-only | List of the possible route status values.
'unknown' : Status can not be determined.
'available' : Route is available.
'restricted' : Traffic is restricted on route.
'unavailable' : Route is unable to service traffic. |
| INT cItpRouteNonAdjStatus | 1.3.6.1.4.1.9.9.228.1.2.1.1.8 | INTEGER | read-only | List of the possible non-adjacent status values.
'unknown' : Status can not be determined.
'allowed' : traffic is allowed.
'restricted' : Traffic is restricted on route.
'prohibited' : Route is prohibited from providing
traffic. |
| cItpRtNotificationsInfo | 1.3.6.1.4.1.9.9.228.1.3 | | | |
| T/F cItpRtNotifInfoSuppressedFlag | 1.3.6.1.4.1.9.9.228.1.3.1 | TruthValue | read-only | A flag to indicate whether cItpRouteStateChange
notifications have been suppressed in the current time
interval specified by the cItpRtChangeNotifWindowTime
object.
'true' Indicates that the device has suppressed the sending
of cItpRouteStateChange notifications for the
remainder of the time interval.
'false' Indicates that the device has not suppressed the
sending of cItpRouteStateChange notifications in
the current time interval. |
| OCT cItpRtNotifInfoStateChanges | 1.3.6.1.4.1.9.9.228.1.3.2 | OCTET STRING | read-only | This object contains a list of route state changes
accumulated until the list is full or the time
time interval specified in cItpRtChangeNotifDelayTime
has passed.
It consists of one or more tuples packed
together in the format of '...'.
Each tuple consist of 32 octets in the following format.
' 20 octets null padded
4 octets
4 octets
destination status 1 octet
1 - unknown state
2 - route is accessible
3 - route is inaccessible
4 - route is restricted'
reserved1 1 octet(set to null)
reserved2 1 octet(set to null)
reserved3 1 octet(set to null)
The maximum number of tuples is 15. |
| cItpRtMIBConformance | 1.3.6.1.4.1.9.9.228.2 | | | |
| cItpRtMIBCompliances | 1.3.6.1.4.1.9.9.228.2.1 | | | |
| cItpRtMIBCompliance | 1.3.6.1.4.1.9.9.228.2.1.1 | | | The compliance statement for entities which implement
the Cisco CISCO-ITP-RT-MIB.my MIB |
| cItpRtMIBComplianceRev1 | 1.3.6.1.4.1.9.9.228.2.1.2 | | | The compliance statement for entities which implement
the Cisco CISCO-ITP-RT-MIB.my MIB |
| cItpRtMIBGroups | 1.3.6.1.4.1.9.9.228.2.2 | | | |
| cItpRtScalarGroup | 1.3.6.1.4.1.9.9.228.2.2.1 | | | Route scalars Group. |
| cItpRouteGroup | 1.3.6.1.4.1.9.9.228.2.2.2 | | | Route table group. |
| cItpRtNotificationsGroup | 1.3.6.1.4.1.9.9.228.2.2.3 | | | Route notification objects. |
| cItpRtScalarGroupRev1 | 1.3.6.1.4.1.9.9.228.2.2.4 | | | Route revision one scalars group. |
