Alteon Application Switch Operating System Application Guide
Bandwidth Management
Document ID: RDWR-ALOS-V2900_AG1302 789
Figure 134: Cookie-Based Preferential Services
The configuration to support this scenario is similar to Example A, page 787. Note the following:
1. Configure the string and assign contracts for the strings and services.
2. If the same string is used by more than one service, and you want to allocate a certain
percentage of bandwidth to a user class for this service on the virtual server, then define a rule
using the urlcont command.
Note: When assigning /cfg/slb/virt 1/service 80/http/urlcont (Contract 1) and /
cfg/slb/layer7/lb/cont
(Contract 2) to the same URL, urlcont will override Contract 2,
even if Contract 2 has higher precedence.
Example Configuring Security Management
BWM can be used to prevent Denial of Service (DoS) attacks that generate a flooding of "necessary
evil" packets. BWM limits the rate of TCP SYN, ping, and other disruptive packets. BWM can alert the
network manager when soft limits are exceeded.
In this example, a filter is configured to match ping packets, and BWM is configured to prevent DoS
attacks by limiting the bandwidth policy rate of those packets:
1. Configure Alteon as usual for SLB (see Server Load Balancing, page 165
):
— Assign an IP address to each of the real servers in the server pool.
— Define an IP interface on Alteon.
>> # /cfg/slb/virt 1/service 80/http/urlcont <URL path ID> <BW Contract number>
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