Packet Captures
gratuitous arp hsrp.cap 480 bytes
Submitted May 16, 2012 by altafk
When router take the role of active in hsrp it sends a gratuitous arp in which source mac is 00:00:0c:07:ac:01, the switches update their mac table for the newly learned mac and starts forwarding to that port.
| Packets: 6 | Duration: 6s | Downloads: 12878 |
VRRP_preempt.cap 1.2 KB
Submitted Sep 14, 2009
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.
| Packets: 16 | Duration: 14s | Downloads: 11259 |
VRRP_failover.cap 2.4 KB
Submitted Sep 14, 2009
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.
| Packets: 32 | Duration: 33s | Downloads: 12035 |
HSRP_failover.cap 3.0 KB
Submitted Sep 14, 2009
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.
| Packets: 39 | Duration: 47s | Downloads: 7592 |
HSRP_election.cap 3.7 KB
Submitted Sep 14, 2009
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.
| Packets: 49 | Duration: 57s | Downloads: 7038 |
HSRP_coup.cap 3.9 KB
Submitted Sep 14, 2009
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.
| Packets: 51 | Duration: 49s | Downloads: 6245 |