Category » Redundancy
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GLBP_election.cap (8.4 KB)

Packets: 80 Avg Size: 91 bytes Duration: 68.0 sec
Data Rate: 0.84 Kbps Added: 19 Jun 2008 Downloads: 222

Routers 1, 2, and 3 participate in a GLBP election. R1 becomes the AVG due to having the highest priority (200), and R3 becomes the standby GLBP. All three routers become AVFs.

VRRP_preempt.cap (1.2 KB)

Packets: 16 Avg Size: 60 bytes Duration: 14.3 sec
Data Rate: 0.52 Kbps Added: 19 Jun 2008 Downloads: 221

Initially R3 is the master, R2 is backup, and R1 is offline. R1 comes back online with a priority of 200, preempting R3 to become the master router.

VRRP_failover.cap (2.4 KB)

Packets: 32 Avg Size: 60 bytes Duration: 32.6 sec
Data Rate: 0.46 Kbps Added: 19 Jun 2008 Downloads: 217

The master router (R1) goes offline. After the down interval passes (roughly 3 seconds), R3 takes over as the master router in packet #12. R2 also offers to take over but R3 wins because it has the higher IP address.

HSRP_coup.cap (3.9 KB)

Packets: 51 Avg Size: 62 bytes Duration: 49.3 sec
Data Rate: 0.50 Kbps Added: 19 Jun 2008 Downloads: 250

Initially only routers 3 (active) and 2 (standby) are online. R1 comes online with a priority higher than R3's. R1 takes over as the active router (the coup occurs in packet #22) almost immediately. R2 is bumped down to passive and R3 becomes the standby router.

HSRP_failover.cap (3.0 KB)

Packets: 39 Avg Size: 62 bytes Duration: 47.3 sec
Data Rate: 0.40 Kbps Added: 19 Jun 2008 Downloads: 229

R1 is the active router, R3 is the standby, and R2 is passive. R1 goes offline and R3 takes over as active after ten seconds. R2 is then promoted to the standby state.

HSRP_election.cap (3.7 KB)

Packets: 49 Avg Size: 62 bytes Duration: 57.0 sec
Data Rate: 0.41 Kbps Added: 19 Jun 2008 Downloads: 239

The Ethernet link shared by routers 1, 2, and 3 comes online. R1 wins the HSRP election because it has a priority of 200 (versus the default of 100 held by the other two routers). R3 becomes the standby router.

Viewing 1 - 6 of 6 captures