Alteon Application Switch Operating System Application Guide
Open Shortest Path First (OSPF)
158
Document
ID:
RDWR-ALOS-V2900_AG1302
5. Attach the network interface to the backbone.
6. Attach the network interface to the stub area.
7. Configure route summarization by specifying the starting address and mask of the range of
addresses to be summarized
8. Use the hide command to prevent a range of addresses from advertising to the backbone.
9. Apply and save the configuration changes.
Example
4: Host Routes
The Alteon OSPF implementation includes host routes. Host routes are used for advertising network
device IP addresses to external networks and allows for Server Load Balancing (SLB) within OSPF. It
also makes ABR load sharing and failover possible.
In
Figure 24 - Host Routes Example, page 159
, both devices have access to servers with identical
content and are configured with the same virtual server IP addresses: 10.10.10.1 and 10.10.10.2.
Alteon 1 is given a host route with a low cost for virtual server 10.10.10.1, and another host route
with a high cost for virtual server 10.10.10.2. Alteon 2 is configured with the same hosts but with
the costs reversed; one host route has a high cost for virtual server 10.10.10.1, and another has a
low cost for virtual server 10.10.10.2.
>> OSPF Area (index) 1 # type stub
(Define area as stub type)
>> OSPF Area (index) 1 # enable
(Enable the area)
>> OSPF Area (index) 1 # /cfg/l3/ospf/if 1
(Select OSPF menu for IP interface 1)
>> OSPF Interface 1 # aindex 0
(Attach network to backbone index)
>> OSPF Interface 1 # enable
(Enable the backbone interface)
>> OSPF Interface 1 # /cfg/l3/ospf/if 2
(Select OSPF menu for IP interface 2)
>> OSPF Interface 2 # aindex
(Attach network to stub area index)
>> OSPF Interface 2 # enable
(Enable the stub area interface)
>> OSPF Interface 2 # /cfg/l3/ospf/range 1
(Select menu for summary range)
>> OSPF Summary Range 1 # addr 36.128.192.0
(Set base IP address of summary range)
>> OSPF Summary Range 1 # mask 255.255.192.0
(Set mask address for summary range)
>> OSPF Summary Range 1 # aindex 0
(Inject summary route into backbone)
>> OSPF Summary Range 1 # enable
(Enable summary range)
>> OSPF Interface 2 # /cfg/l3/ospf/range 2
(Select menu for summary range)
>> OSPF Summary Range 2 # addr 36.128.200.0
(Set base IP address)
>> OSPF Summary Range 2 # mask 255.255.255.0
(Set mask address)
>> OSPF Summary Range 2 # hide enable
(Hide the range of addresses)
>> OSPF Summary Range 2 # apply
(Global command to apply all changes)
>> OSPF Summary Range 2 # save
(Global command to save all changes)
