Category Archives: Nexus

VPC Self Isolation

By | April 24, 2020

VPC Self Isolation VPC Self isolation is used for handle the failure. It works like the object tracking. If a module fails on primary switch then primary switch sends a message over keepalive link to inform peering (secondary switch). This message is used to inform secondary switch that one module has been failed on primary… Read More »

Cisco Nexus Enhance Object Tracking – Boolean OR in VPC

By | April 21, 2020

Cisco Nexus Enhance Object Tracking ( Boolean OR ) in VPC Nexus supports Boolean OR rule but it not support to Boolean END rule. We can use Boolean OR rule/object tracking to track the objects and isolate the VPC domain if tracking fails. It is useful. When we are not having configured FHRP on VPC… Read More »

DHCP Snooping

By | March 29, 2020

DHCP snooping acts like a firewall between DHCP servers and un-trusted host/ports. It validates the DHCP messages received from un-trusted ports and filter out the invalid messages. Un-trusted ports are all host ports in a VLAN. which is configure for DHCP snooping. Trusted ports are ports connected to router, switch and server. DHCP snooping creates… Read More »

Spanning-Tree Bridge Assurance

By | March 27, 2020

Spanning-tree BPDUs are a one way process. Means, a switch can only send the BPDUs for announce itself. But it can’t expect the response of these BPDUs. We can change this behavior by using the Spanning-Tree Bridge Assurance. bridge assurance enables the two-way BPDU communication. All operational ports will send the BPDUs , including the… Read More »

Using Ethanalyzer On Nexus Platform For Control-Plane And Data-Plane Traffic Analysis

By | March 26, 2020

Below is the Ethanalyzer for data palne. For control plane please click on green button below: By default, wireshark or ETH is used to capture the control plane traffic. But we can also capture the data plane traffic by creating ACLs with log keyword and then apply the ACL on interface. In this case, control… Read More »