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What hsrp group uses the mac address 0000.0c07.ac11

Packet capture revealed that after initial startup while trying to ping the hsrp ip, there was an arp request logically and the hsrp replied with default virtual mac, much like the one in the question show.. After the ping-initiating device got the reply, it used that mac in the icmp packets, packets arrived at the target device yet the device did not respond at all - hence the request timed out. Knowing this, I performed a ping from hsrp ip the other way around only to find out that the hsrp device is using a different source mac address than the virtual default mac provided from the show command output.

It actually used a VLAN interface mac address. Taking a step back here to explain what is going on here. It makes sense that the arp reply contained a HSRP default virtual mac for that group. After this change, the icmp reached it's destination and the destination sent a reply to the hsrp IP with a mac address from the initial arp reply it got - the default virtual mac for that hsrp group.

This is the problem we have. The packet arrives at the VLAN interface and the looks at the L2 information first - identifies the target of this packet and finds out the target mac address is not the VLAN interface mac so it discards the packets L3 logic.

Example Questions

The command mirrors vlan interface's mac address so these issues with discarding packets int vlan interface never happen and the ping works like magic. Only the switch that detects a topology change. Only the secondary root bridge when it takes over. Which of these is the single most important design decision to be made in a network. Removing any redundant links Making sure all switches run the same version of IEEE Root bridge placement. Making sure all switches have redundant links. What happens to a port that is neither a root port nor a designated port?

It is available for normal use. It can be used for load balancing. It is put into the Blocking state. It is disabled. What is the maximum number of root ports that a Catalyst switch can have? What mechanism is used to set STP timer values for all switches in a network? Configuring the timers on every switch in the network. Configuring the timers on the root bridge switch.

Configuring the timers on both primary and secondary root bridge. Chapter 8: Where should the root bridge be placed on a network? On the fastest switch Closest to the most users. Closest to the center of the network. On the least-used switch. Which of the following is a result of a poorly placed root bridge in a network? Bridging loops form. STP topology can take unexpected paths. Root bridge election flapping occurs. Which of these parameters should you change to make a switch become a root bridge? Switch MAC address. Port priority. Bridge priority What is the default Which of the following commands is most likely to make a switch become the root.

What is the default path cost of a Gigabit Ethernet switch port? What happens if the root bridge switch and another switch are configured with different. STP Hello timer values? Nothing—each sends hellos at different times.

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A bridging loop could form because the two switches are out of sync. The switch with the lower Hello timer becomes the root bridge. The other switch changes its Hello timer to match the root bridge. What network diameter value is the basis for the default STP timer calculations? An access-layer switch port connected to a PC-. An access-layer switch port connected to a hub.

A distribution-layer switch port connected to an access layer switch. A core-layer switch port. An access-layer switch. A distribution-layer switch. A core-layer switch. All backbone- or core-layer switches. All backbone- and distribution-layer switches. All access-layer switches-. All switches in the network. Which one of the following commands can be used to verify the current root bridge.

Chapter 9: Why is it important to protect the placement of the root bridge? To keep two root bridges from becoming active. To keep the STP topology stable So all hosts have the correct gateway. So the root bridge can have complete knowledge of the STP topology.


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Which of the following features protects a switch port from accepting superior BPDUs? STP Loop Guard. STP Root Guard. All ports. Only ports where the root bridge should never appear. Only ports where the root bridge should be located-. Only ports with PortFast enabled. Which of the following features protects a switch port from accepting BPDUs when. PortFast is enabled? To maintain a loop-free STP topology, which one of the following should a switch uplink.

A sudden loss of BPDUs. Too many BPDUs. The wrong version of BPDUs. BPDUs relayed from the root bridge. STP Loop Guard detects which of the following conditions? The sudden appearance of superior BPDUs. The sudden lack of BPDUs. The appearance of duplicate BPDUs-. The appearance of two root bridges.

This Quiz Is Related To Router

Which of the following features can actively test for the loss of the receive side of a. UDLD must detect a unidirectional link before which of the following? The Max Age timer expires. STP moves the link to the Blocking state. STP moves the link to the Forwarding state. STP moves the link to the Listening state. What must a switch do when it receives a UDLD message on a link? Relay the message on to other switches.

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Send a UDLD acknowledgment. Echo the message back across the link. Drop the message. Which of the following features effectively disables spanning-tree operation on a. STP PortFast. To reset switch ports that have been put into the errdisable mode by UDLD, which. Chapter Which one of the following commands enables the use of RSTP? RSTP is enabled by default. On which standard is RSTP based? Which of the following is not a port state in RSTP? When a switch running RSTP receives an The BPDU is discarded or dropped.

An ICMP message is returned. The switch begins to use The switch disables RSTP. When does an RSTP switch consider a neighbor to be down? After three BPDUs are missed After six BPDUs are missed. After the Max Age timer expires. After the Forward timer expires. Which process is used during RSTP convergence? BPDU propagation Forward timer expiration.

What causes RSTP to view a port as a point-to-point port? Port media-. Port duplex. Which of the following events triggers a topology change with RSTP on a nonedge. A port comes up or goes down. A port comes up. A port goes down. A port moves to the Forwarding state. Which of the following is not a characteristic of MST? A reduced number of STP instances. Fast STP convergence.

Eliminated need for CST. Which of the following standards defines the MST protocol? Which of the following arrangements can be considered interVLAN routing? One switch, two VLANs, one connection to a router. One switch, two VLANs, two connections to a router. Two switches, two VLANs, two connections to a router.

All of these answers are correct. Cannot be determined. Which of the following commands configures a switch port for Layer 2 operation? Which of the following commands configures a switch port for Layer 3 operation? Which one of the following interfaces is an SVI? What information must be learned before CEF can forward packets? The source and destination of the first packet in a traffic flow.

The MAC addresses of both the source and destination. The contents of the routing table The outbound port of the first packet in a flow. Which of the following best defines an adjacency? Two switches connected by a common link. Two contiguous routes in the FIB. Two multilayer switches connected by a common link. The MAC address of a host is known. Assume that CEF is active on a switch. What happens to a packet that arrives needing. The packet is switched by CEF and kept intact. The packet is fragmented by CEF. The packet is dropped. The packet is sent to the Layer 3 engine. How is the. The sending host must send an ARP request for it.

All packets to the destination are dropped. During a packet rewrite, what happens to the source MAC address? There is no change. It is changed to the destination MAC address. It is changed to the MAC address of the outbound Layer 3 switch interface. It is changed to the MAC address of the next-hop destination.


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  4. Which one of the following answers represents configuration commands needed to. Where does a collision domain exist in a switched network? On a single switch port. Across all switch ports-. On a single VLAN. Across all VLANs. Where does a broadcast domain exist in a switched network? Across all switch ports. On a single VLAN-. What is a VLAN primarily used for? To segment a collision domain. To segment a broadcast domain To segment an autonomous system.

    To segment a spanning-tree domain. How many layers are recommended in the hierarchical campus network design model? What is the purpose of breaking a campus network into a hierarchical design? To facilitate documentation. To follow political or organizational policies. To make the network predictable and scalable. To make the network more redundant and secure End-user PCs should be connected into which of the following hierarchical layers?

    642-813 - Implementing Cisco Switched Networks

    Distribution layer. Common layer. Access layer Core layer. In which OSI layer should devices in the distribution layer typically operate? Core switches. Broadcast domains. Routing updates. Access-layer switches. In the core layer of a hierarchical network, which of the following are aggregated? Routing tables Packet filters. Distribution switches. In a properly designed hierarchical network, a broadcast from one PC is confined. One access-layer switch port. One access-layer switch.

    One switch block-. The entire campus network. Which one or more of the following are the components of a typical switch block? Distribution-layer switches. Core-layer switches. E-commerce servers. Service provider switches-. What are two types of core, or backbone, designs? Collapsed core. Loop-free core. Dual core. Layered core. What is the maximum number of access-layer switches that can connect into a single. Limited only by the number of ports on the access-layer switch-.

    Limited only by the number of ports on the distribution-layer switch. A switch block should be sized according to which two of the following parameters? The number of access-layer users. A maximum of access-layer users. A study of the traffic patterns and flows. The amount of rack space available. What evidence can be seen when a switch block is too large? Choose all that apply.

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      HSRP Hot Standby Routing Protocol in Packet Tracer 6.1

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