Category Archives: High Availability

Topics related to high availability techniques such as HSRP, VRRP, GLBP, REP, HiPer Ring.

Upgrade bigip image in active/standby HA

Import the latest iso to both the active and standby bigip Install latest iso on standby bigip On command line: [root@bigip2:Standby:In Sync] config # tmsh root@(bigip2)(cfg-sync In Sync)(Standby)(/Common)(tmos)# /sys software image root@(bigip2)(cfg-sync In Sync)(Standby)(/Common)(tmos.sys.software.image)# install BIGIP-12.1.0.0.0.1434.iso volume HD1.1 HD1.1 currently … Continue reading

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BIGIP virtual server status

Virtual server is enabled but is unavailable Although the virtual server is enabled, is unavailable. This is because a pool member has reached its connection limit. In this scenario two virtual servers were marked down by health monitor, and the … Continue reading

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Bigip Active/Standby HA

Summary step Create high availability VLAN and self ip on both bigip1 and bigip2. Create HA configuration on both bigip1 and bigip2 such as config sync and failover network. HA cluster setup such as include peer into trust domain and … Continue reading

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Palo Alto Networks: Active/Active High Availability

Scenario The pair of PA5050 firewalls are at the edge of the network, the downstream of PA5050 pairs has a pair of Cisco Catalyst 6506 and a pair of Cisco Catalyst 4506 switches. The diagram is illustrated as below. The … Continue reading

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Cisco Systems: Virtual Switching System

Virtual Switching System If you have used Cisco catalyst 3750 stackwise technology you will grasp this VSS concept quickly. VSS is supported on the 6500 series switch platform that uses Sup720-10GE, the lab I did however is based on Cisco … Continue reading

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Hot standby router protocol (HSRP): Recovery / failover time test

Diagram for HSRP test plan Test objective and test procedures Both 1841 routers were configured HSRPv2 for redundancy. Vlan 10 is tested in this test plan to demonstrate the failover time when a link failed between router and switch. Catalyst … Continue reading

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Stackwise

Stack master election criteria The criteria is in order, if the first criteria does not meet the second criteria will be the tie breaker. 1. The switch that is configured with the highest stack priority. 2. The switch that is … Continue reading

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