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128 ServerIron ADX Firewall Load Balancing Guide
53-1002436-01
Configuring IronClad Layer 3 FWLB for NAT
5
DRAFT: BROCADE CONFIDENTIAL
Configuring the ServerIron ADX priority
If you are configuring the ServerIron ADX for IronClad FWLB, you must specify the priority for the
firewalls within the firewall group. The priority determines which of the partner ServerIron ADXs that
are configured together for IronClad FWLB is the default active ServerIron ADX for the firewalls
within the group.
You can specify a priority from 0 through 255. The ServerIron ADX with the higher priority is the
default active ServerIron ADX for the firewalls within the firewall group.
NOTE
If you specify 0, the CLI removes the priority. When you save the configuration to the startup-config
file, the sym-priority command is removed. You cannot remove the priority using the no sym-priority
command.
To configure a ServerIron ADX to be the default active ServerIron ADX for the firewalls in group 2,
enter the following commands.
Commands for active ServerIron ADX A (external active)
SI-ActiveA(config)# server fw-group 2
SI-ActiveA(config-fw-2)# sym-priority 255
Commands for standby ServerIron ADX A (external standby)
To configure another ServerIron ADX to not be the default active ServerIron ADX for the firewalls in
group 2, enter the following commands.
SI-StandbyA(config)# server fw-group 2
SI-StandbyA(config-fw-2)# sym-priority 1
Commands for active ServerIron ADX B (internal active)
SI-ActiveB(config)# server fw-group 2
SI-ActiveB(config-fw-2)# sym-priority 255
Commands for standby ServerIron ADX B (internal standby)
SI-StandbyB(config)# server fw-group 2
SI-StandbyB(config-fw-2)# sym-priority 1
Syntax: [no] sym-priority <num>
The <num> variable can be from 0 through 255.
Preventing load balancing of the NAT addresses
To prevent load balancing of the NAT address when configuring an IronClad FWLB for Layer 3 NAT
firewalls, refer to
“Preventing load balancing of the NAT addresses” on page 118.
- ServerIron ADX 1
- Document History 2
- Contents 3
- About This Document 8
- Document conventions 9
- Notice to the reader 10
- Related publications 11
- ServerIron FWLB Overview 12
- Firewall environments 14
- Load balancing paths 15
- Firewall selection 17
- Hashing mechanism 17
- Stateful FWLB 18
- Health checks 18
- Path health checks 19
- Application health checks 19
- Firewall health check debug 21
- Basic FWLB topology 22
- HA FWLB topology 23
- Failover 24
- Router paths 24
- Multizone FWLB topology 25
- FWLB configuration limits 26
- Configuring Basic FWLB 28
- IPv4 Firewall-1 37
- IPv4 Firewall-2 37
- External 40
- Internal 40
- Firewall-2 42
- Firewall-1 42
- Configuring HA FWLB 48
- Session limits 49
- Session aging 49
- Task Reference 52
- Configuring the firewall port 53
- Configuring the partner port 54
- Configuring the router port 55
- Configuring the firewalls 55
- Adding the firewalls 55
- Connection rate control 57
- Complete CLI example 62
- HA FWLB with VRRP 73
- Usage notes 78
- Configuring Multizone FWLB 82
- Zone 3Zone 2 84
- Zone1-SI(config)# no span 85
- Failover algorithm 92
- Commands on Zone1-SI-A zone 1 92
- DRAFT: BROCADE CONFIDENTIAL 100
- 53-1002436-01 102
- SI-A SI-A 104
- In this chapter 124
- NAT firewalls 124
- Extra firewall method 129
- Access policy method 130
- Specifying the partner port 134
- Specifying the router ports 134
- Configuring FWLB and SLB 146
- Configuring SLB-to-FWLB 148
- Configuring the real servers 149
- Enabling SLB-to-FWLB 150
- Configuring FWLB-to-SLB 152
- Enabling FWLB-to-SLB 154
- FWLB configuration overview 166
- TCP/UDP port statistics 169
- FWLB path information 172
- Field Description 173
- • 6 – TCP 174
- • 17 – UDP 174
- In this appendix 176
- FWLB selection algorithms 182
- Configuration guidelines 186
- Denying FWLB 187
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