What is EIGRP TLV?

What is EIGRP TLV?

EIGRP IP Internal Route TLV The delay value is the sum of all the delay parameters on the interface across the path to the destination network. MTU: This field specifies the interface MTU parameter of the route metric. Hop count: This field specifies the number of hops to the destination network.

What are the reliable packets in EIGRP?

EIGRP Queries are sent reliably as multicasts. reliably as unicasts. Acknowledge Used to acknowledge EIGRP Updates, Queries, and Replies; Hello and ACK packets do not require acknowledgment. ACKs are Hello packets that contain no data and a non-zero acknowledgment number and are sent as unicasts.

What packet formats are used in EIGRP?

EIGRP sends out five different types of packets—hello, update, query, reply, and acknowledge (ACK)—that are used to establish the initial adjacency between neighbors and to keep the topology and routing tables current.

What are the states in EIGRP?

A Passive state indicates that a route is reachable, and that EIGRP is fully converged. A stable EIGRP network will have all routes in a Passive state. A route is placed in an Active state when the Successor and any Feasible Successors fail, forcing the EIGRP to send out Query packets and re- converge.

What is the multicast address of RIPv2?

224.0.0.9
RIPv1 and RIPv2 updates are formatted slightly differently. RIPv1 updates are sent to a broadcast address (255.255. 255.255); RIPv2 updates can be sent either to a broadcast or multicast address (224.0. 0.9).

What two tables are used in EIGRP routing?

EIGRP tables

• Neighbor table – stores information about EIGRP neighbors. Before exchanging routes, routers need to establish a neighbor relationship.
• Topology table – stores routing information learned from neighbor routing tables.
• Routing table – stores only the best routes to reach a remote network.

What are EIGRP update packets sent?

EIGRP sends acknowledgment packets to the unicast address of the sender of the update packet. Update — Update packets contain routing information for destinations. EIGRP unicasts update packets to newly discovered neighbors; otherwise, it multicasts update packets to 224.0. 0.10 when a link or metric changes.

What is active route in EIGRP?

Note – The EIGRP term “active” refers to a route for which a router is currently using the Query process to find a loop-free alternative route. Conversely, a route is in passive state when it is not in an active state. The neighboring routers view any received Query messages as an input event.

What is the EIGRP management information in a TLV?

TLVs carry EIGRP management information. The Parameters of TLV that are used to convey metric weights and the hold time. The Sequence, Software Version, and Next Multicast Sequence TLVs are used by the Cisco proprietary Reliable Multicast algorithm. As it was mentioned earlier TLV not only works with IP but also IPX and Apple Talk.

What are the different types of EIGRP packets?

EIGRP will use six different packet types when communicating with its neighboring EIGRP routers, Hello Packets – EIGRP sends Hello packets once it has been enabled on a router for a particular network. Acknowledgement Packets – An EIGRP Acknowledgment (ACK) packet is simply an EIGRP Hello packet that contains no data.

Where does the acknowledgement packet go in EIGRP?

Acknowledgement packets are used by EIGRP to confirm reliable delivery of EIGRP packets. ACKs are always sent to a Unicast address, which is the source address of the sender of the reliable packet, and not to the EIGRP Multicast group address.

What is the opcode of an EIGRP hello packet?

EIGRP Hello packets have an OPCode of 5. Acknowledgement Packets – An EIGRP Acknowledgment (ACK) packet is simply an EIGRP Hello packet that contains no data. Acknowledgement packets are used by EIGRP to confirm reliable delivery of EIGRP packets.