L3 redundancy.pdf - the Netgroup at Politecnico di Torino
L3 redundancy.pdf - the Netgroup at Politecnico di Torino
L3 redundancy.pdf - the Netgroup at Politecnico di Torino
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
HSRP/VRRP on real LANs: L2 resiliency (1)H1DG: 2.2.2.3H2DG: 2.2.2.3H3DG: 2.2.2.4H4DG: 2.2.2.4Fault 5: IP networkpartitioned in half(exit traffic may use R1,but incoming trafficmay come through R2)SW-1SW-2Fault 2: OK(traffic re-routedthrough R2)Fault 3: OK(traffic continuesthrough R1)R2 (active)IP: 2.2.2.2Virtual IP: 2.2.2.3Fault 1: OK(traffic re-routedthrough R2)R1 (standby)IP: 2.2.2.1Fault 4: non-optimized exitp<strong>at</strong>h, but everything works(“track” function useless)50InternetWe must engineer <strong>the</strong>network with resiliency <strong>at</strong>d<strong>at</strong>a-link level (e.g. linkaggreg<strong>at</strong>ion between SW-1and SW-2 or STP/RSTP)
Change language