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9500 MPR 1.x IP Addressing
9500 MPR 1.x IP Addressing
2 | 9500 MPR 1.x IP Addressing |27/02/2009 All Rights Reserved © Alcatel-Lucent 2009
MPR IP Addressing 1
The MPR NE is identified by its Local IP Address.
All point-to-point interfaces (TMN RF in 1.x) are unnumbered and borrow the IP address from the Local IP Address.
The MPR has two Ethernet interfaces which can be used to access locally the NE. Each interface has its own IP address which must belong to different subnet than the other.
Local IP Address10.0.1.1Local Ethernet
on User Port 4 IP Address 2
Local Ethernet IP Address 1192.168.2.0/24
.1
.2192.168.1.0/24
.1
.2
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MPR IP Addressing 2
The CT access the NE using the Local IP Address, the SNMP Trap are sent by NE using the Local IP Address as source IP address.
It is possible to configure the IP address of one of the two Local Ethernet interfaces with the same value used for Local IP Address.
Local IP Address10.0.1.1Local Ethernet
on User Port 4 IP Address 2
Local Ethernet IP Address 1
192.168.2.0/24.1
.2
.1
.210.0.1.0/24
NE 10.0.1.1
NE 10.0.1.1
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MPR IP Addressing 3
In the following scenario the station B, in order to reach the Local IP Address, must be configured with a Default Gateway or static route having the IP Address 2 as gateway.
Local IP Address10.0.1.1Local Ethernet
IP Address 2 User Port 4
Local Ethernet IP Address 1
192.168.2.0/24.1
.2
.1
.210.0.1.0/24
NE 10.0.1.1
NE 10.0.1.1
A
B
•Default Gateway 192.168.2.1
•10.0.1.0/24 Gateway 192.168.2.1
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MPR IP Addressing 4
When Local Ethernet IP addresses are different from Local IP Address all of them must belong to different subnets.
In the following scenario, station A and B, in order to reach the Local IP Address, must be configured with a Default Gateway or static route having the Local Ethernet IP Address as gateway.
Local IP Address10.0.1.1Local Ethernet
IP Address 2 User Port 4
Local Ethernet IP Address 1
192.168.2.0/24.1
.2
.1
.2192.168.1.0/24
NE 10.0.1.1
NE 10.0.1.1
A
B
•Default Gateway 192.168.1.1
•10.0.1.0/24 Gateway 192.168.1.1
•Default Gateway 192.168.2.1
•10.0.1.0/24 Gateway 192.168.2.1
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MPR IP Addressing 5
In the following scenario, the CT, in order to reach the local and remote NEs by their Local IP Address, must be configured with a Default Gateway or static route having the Local Ethernet IP Address as gateway.
At the same time the CT must be reachable by the remote NE using a static route or enabling OSPF on local and remote NE.
Local IP Address10.0.1.1
Local Ethernet IP Address 1 .1
.2
192.168.1.0/24NE 10.0.1.1
NE 10.0.1.2
•Default Gateway 192.168.1.1
•10.0.1.0/24 Gateway 192.168.1.1
Local IP Address10.0.1.2
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MPR IP Addressing 6
In order to allow more than one CT to access the network, the IP addresses configured on each Local Ethernet interface inside the network must belong to different subnets.
Local IP Address10.0.1.1
Local Ethernet IP Address 1 .1
.2
192.168.1.0/24
NE 10.0.1.1
NE 10.0.1.2
•Default Gateway 192.168.1.1
•10.0.1.0/24 Gateway 192.168.1.1
Local IP Address10.0.1.2
.2 NE 10.0.1.1
NE 10.0.1.2
•Default Gateway 192.168.2.1
•10.0.1.0/24 Gateway 192.168.2.1
.1
192.168.2.0/24
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MPR IP Addressing 7
The following scenario doesn’t work and it’s not allowed. Following IP routing rules the 10.0.1.2 address must be directly reachable by the CT.
Local IP Address10.0.1.1
Local Ethernet IP Address 1 .1
.3
10.0.1.0/24NE 10.0.1.1
NE 10.0.1.2
Local IP Address10.0.1.2
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MPR IP Addressing 8
In order to reach the remote NE, its Local IP Address must belong to a different subnet. A Default Gateway or static route having the Local Ethernet IP Address as gateway must be configured to make the remote NE reachable by CT.
Local IP Address10.0.1.1
Local Ethernet IP Address 1 .1
.3
10.0.1.0/24NE 10.0.1.1
NE 172.16.1.1
Local IP Address172.16.1.1
•Default Gateway 10.0.1.1
•172.16.1.0/24 Gateway 10.0.1.1
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MPR IP Addressing 9
The OSPF routing protocol can be activated on each point-to-point interface and on each Local Ethernet interface.
The MPR NE can act as ABR (Area Border Router) managing a maximum of 4 areas (Backbone + 3 areas). It is possible to assign different OSPF areas to each point-to-point interface.
An OSPF area can be configured as Stub Area. Configuring a Stub Area reduces the topological database size and reduces the memory requirements for NE inside that area for NEs that are not ABR.
The OSPF Area Identifier can take a form similar to an IP address A.B.C.D
The Area 0 or Backbone has Area ID 0.0.0.0
The Area ID hasn’t any correlation with the IP address of the interface that belongs to that area.
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MPR IP Addressing 10
Enabling OSPF, static routing information configured on one NE are automatically redistributed as OSPF external routes inside the OSPF areas active on this NE.
Static routing are not redistributed inside the OSPF areas configured as Stub Area.
If OSPF is enabled on NEs, static routes, if needed, have to be added only on the NE reached by Ethernet (called Gateway NE).
In case of CT not directly connected to Gateway NE, the Ethernet interface of this NE must be reachable in order to make the software download working.
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MPR IP Addressing 11
An example of OSPF Area configuration.
Local IP Address10.0.1.1
Local Ethernet IP Address 1 OSPF Area 0
.1
.2
192.168.1.0/24
NE 10.0.1.1 NE 10.0.1.2 NE 10.0.1.3
Local IP Address10.0.1.2
Default Gateway 10.0.1.1
Local IP Address10.0.1.3
PtP TMN RF OSPF Area 1
PtP TMN RF OSPF Area 1
OSPF Area 1 OSPF Area 2
PtP TMN RF OSPF Area 2
PtP TMN RF OSPF Area 2
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