What is the EIGRP multicast address for IPv6?
The reserved EIGRP multicast address for IPv6 is FF02::A. EIGRP routers discover neighbors and establish adjacencies with neighbor routers using the Hello packet. On most modern networks, EIGRP Hello packets are sent as multicast packets every five seconds.
How to use EIGRP for IPv6 routing?
It contains the must-know commands. Create an EIGRP for IPv6 routing instance with ipv6 router eigrp , the AS ID must match on all routers Here, you need to define a router ID with eigrp router-id <ID>, and turn on the process with no shutdown You can propagate connected networks without having them join the EIGRP for IPv6 instance.
What is enhanced interior gateway routing protocol (EIGRP)?
Customers can configure Enhanced Interior Gateway Routing Protocol (EIGRP) to route IPv6 prefixes. EIGRP IPv4 runs over an IPv4 transport, communicates only with IPv4 peers, and advertises only IPv4 routes, and EIGRP for IPv6 follows the same model.
How do I See my IPv6 neighbors on R4?
We can do it by typing show ipv6 eigrp neighbors, which will give you an output like the one below. Neighbors on R4. This command is identical to the one we used in IPv4. Same output, same columns, the same information. We can see the IPv6 address of each neighbor, and the interface we see the neighbor on.
What is the IPv6 multicast address used by EIGRP?
ff02::aff02::2: All IPv6 routers. ff02::5: All OSPFv3 routers. ff02::a: All EIGRP (IPv6) routers.
How is EIGRP for IPv6 configuration done?
The configuration of EIGRP for IPv6 has some restrictions; which are: The interfaces can be directly configured with EIGRP for IPv6, without the use of a global IPv6 address. There is no network statement in EIGRP for IPv6. The router ID needs to be configured for an EIGRPv6 protocol instance before it can run.
What commands are used to enable EIGRP for IPv6 on an interface?
EIGRP for IPv6 Configuration1Enter global configuration mode3Enter interface configuration mode4Enable EIGRP for IPv6 on the interfaceRepeat steps 1-4 on all EIGRP for IPv6 interfaces5Enter EIGRP for IPv6 router configuration modeNote: This is a global configuration mode command2 more rows•Jun 13, 2012
How EIGRP establish neighbor relationships?
The router sends hello packets out of interfaces configured for EIGRP using the EIGRP multicast address 224.0. 0.10. When an EIGRP router receives a hello packet from a router belonging to the same autonomous system (AS), it establishes a neighbor relationship (adjacency).
What is the difference between EIGRP IPv4 and IPv6?
EIGRP for IPv6 advertises IPv6 prefixes/lengths, rather than IPv4 subnet/mask information. EIGRP for IPv6 uses the neighbor's link-local address as the next-hop IP address; EIGRP for IPv4 has no equivalent concept.
Which command can turn off EIGRP for the IPv6 routing process?
Table 3-6 Commands Used in Example 3-20Command(s)Descriptionipv6 unicast-routingEnable IPv6 routingipv6 router eigrp 1Configure EIGRP with AS number 1no shutdownEnable the EIGRP processshow ipv6 protocolVerify the EIGRP process has started (more on EIGRP verification/show commands in the next section)2 more rows•Oct 18, 2013
What is global IPv6 address?
A global IPv6 address consists of two parts: subnet ID – 64 bits long. Contains the site prefix (obtained from a Regional Internet Registry) and the subnet ID (subnets within the site). interface ID – 64 bits long. typically composed of a part of the MAC address of the interface.
What is the first step in configuring IPv6 routing on a Cisco IOS router?
Terms in this set (13) What is the first step in configuring IPv6 routing on a Cisco IOS router? Enable IPv6 routing. Which Cisco IOS command is used to display the IPv6 multicast groups to which an interface belongs? When generating a unique interface ID, the rules of EUI-64 are often used (eui-64).
How do I get an IPv6 address?
Configuring IPv6 AddressesIn the Managed Network node hierarchy, navigate to the Configuration > Interfaces > VLANs tab.Select a Vlan. ... Select the corresponding Vlan. ... Select the IPv6 tab and expand the IP Address Assignment accordion.Enable Use Static addresses. ... Click + in IPV6 addresses.More items...
Which ipv4 multicast address is used by EIGRP?
The EIGRP multicast address is 224.0. 0.10. An EIGRP router only establishes neighbor relationships (adjacencies) with other routers within the same autonomous system.
Which IP address does EIGRP send routing updates to?
address 224.0.0.10EIGRP does not send updates using a broadcast address; instead, it sends them to the multicast address 224.0. 0.10 (all EIGRP routers).
What are the neighbor requirements for EIGRP?
Table 4-4 Neighbor Requirements for EIGRP and OSPFRequirementEIGRPOSPFInterfaces' primary IP addresses must be in same subnet.YesYesMust not be passive on the connected interface.YesYesMust use the same ASN (EIGRP) or process-ID (OSPF) in the router configuration command.YesNo7 more rows•Nov 26, 2014
What is EIGRP in networking?
Enhanced Interior Gateway Routing Protocol (EIGRP) is a network protocol that enables routers to exchange information more efficiently than earlier network protocols, such as Interior Gateway Routing Protocol (IGRP) or Border Gateway Protocol (BGP).
How do you verify that EIGRP protocol is running on a router?
To verify that the router recognizes EIGRP routes for any neighbors, use the show ip route eigrp command, as shown in Example 3-26. Example 3-27 exhibits the show ip route command, which displays the full IP routing table, including the EIGRP routes.
What is EIGRP number?
Router eigrp autonomous-system number - It is used to enable the EIGRP process. This AS-number is a 16-bit value between 1 and 65,535. The value chosen must be the same for all routers within a given EIGRP routing domain.
Which type of EIGRP route entry describes a feasible successor?
Explanation: EIGRP uses the Neighbor Table to list adjacent routers. The Topology Table list all the learned routers to destination whilst the Routing Table contains the best route to a destination, which is known as the Successor.
What is EIGRP in Cisco?
EIGRP is an enhanced version of the IGRP developed by Cisco. EIGRP uses the same distance vector algorithm and distance information as IGRP. However, the convergence properties and the operating efficiency of EIGRP have improved substantially over IGRP.
What is EIGRP route authentication?
EIGRP route authentication provides message digest algorithm 5 (MD5) authentication of routing updates from the EIGRP routing protocol. The MD5 keyed digest in each EIGRP packet prevents the introduction of unauthorized or false routing messages from unapproved sources.
How much bandwidth does EIGRP use?
By default, EIGRP packets consume a maximum of 50 percent of the link bandwidth, as configured with the bandwidth interface command. You might want to change that value if a different level of link utilization is required or if the configured bandwidth does not match the actual link bandwidth (it may have been configured to influence route metric calculations).
Why do routing devices send packets to each other?
Routing devices periodically send hello packets to each other to dynamically learn of other devices on their directly attached networks. This information is used to discover neighbors and learn when neighbors become unreachable or inoperative.
What is EIGRP for IPv6?
Similar to all other IPv6 RPs, EIGRP for IPv6 is enabled on a per-interface basis. If a router is able to acquire its ID from an IPv4 address existent on it, the EIGRP for IPv6 protocol configuration is simple, as illustrated here:
What is EIGRP routing?
The Cisco proprietary Enhanced Interior Gateway Protocol (EIGRP) was developed to bridge the gap between the traditional distance vector protocols (IGRP, RIP) and the advanced link-state protocols (OSPF, IS-IS). It integrates some of the proven capabilities of the latter to improve the operation and the scalability of the former. Nevertheless, the intent was to avoid some of the topological constraints that are sometimes associated with link-state protocols. The result is a simple yet fast converging, resilient, and scalable routing protocol that is largely adopted in many enterprise networks as well as the edge of some ISP networks.
How to configure EIGRP for IPv6?
Step 1: Cable the network as shown in the topology. Step 2: Configure basic settings for each device. Part 2: Implement EIGRP for IPv 6 and Named EIGRP. Step 1: Configure EIGRP for IPv6 on R2. Step 2: Configure Named EIGRP for IPv6 on R1 and R3. Step 3: Verify EIGRP for IPv6.
What is EIGRP for IPv6?
EIGRP for IPv6 supports authentication on an interface basis. In other words, each interface can be configured to require authentication of the connected peer. This ensures that connected devices that try to form an adjacency are authorized to do so. Classic EIGRP supports key-chain based MD5-hashed keys, while Named EIGRP adds support for SHA256-hashed keys. The two are not compatible.
How many paths does EIGRP support?
By default, load balancing occurs only over equal-cost paths. EIGRP supports up to four equal cost paths by default but can be configured to support as many as 32 with the maximum-paths command.
What is passive interface?
Passive interfaces are interfaces that only partially participate in the operation of a routing protocol. The network that a passive interface is connected to is advertised, while the routing protocol does not actually transmit routing protocol-specific traffic on that interface. Use passive interfaces when you have a connected network that you want to advertise, but you do not want protocol neighbors to appear on that interface. Interfaces supporting users should always be configured as passive. There are two ways to configure interfaces as passive. The first is specifically by interface. The other is to make all interfaces default to passive default. Normally a device with many LAN interfaces will use the default option, and then use the no form of the command on the specific interfaces that should be sending and receiving EIGRP messages.
Can EIGRP be configured to propagate a default route to other EIGRP routers in the AS?
EIGRP for IPv6 can be configured to propagate a default route to other EIGRP routers in the AS. This lab will explore two methods of propagating a default route, either by redistributing a default static route or by sharing a summary default route.
Chapter: Implementing EIGRP for IPv6
Customers can configure Enhanced Interior Gateway Routing Protocol (EIGRP) to route IPv6 prefixes. EIGRP IPv4 runs over an IPv4 transport, communicates only with IPv4 peers, and advertises only IPv4 routes, and EIGRP for IPv6 follows the same model. EIGRP for IPv4 and EIGRP for IPv6 are configured and managed separately.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release.
Restrictions for Implementing EIGRP for IPv6
This section lists ways in which EIGRP for IPv6 differs from EIGRP IPv4 and lists EIGRP for IPv6 restrictions:
Information About Implementing EIGRP for IPv6
EIGRP is an enhanced version of the IGRP developed by Cisco. EIGRP uses the same distance vector algorithm and distance information as IGRP. However, the convergence properties and the operating efficiency of EIGRP have improved substantially over IGRP.
How to Implement EIGRP for IPv6
EIGRP for IPv6 is directly configured on the interfaces over which it runs, which allows EIGRP for IPv6 to be configured without the use of a global IPv6 address.
Configuration Examples for Implementing EIGRP for IPv6
EIGRP for IPv6 is configured directly on the interfaces over which it runs. This example shows the minimal configuration required for EIGRP for IPv6 to send hello packets in order to establish adjacencies on Ethernet 0:
Feature Information for Implementing EIGRP for IPv6
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Configuration Commands
In the video, only two routers (UK-LH and UK-NO) were configured to make the video short but the same idea can be applied to other routers if you want to try the configurations yourself. Also, I added the ipv6 address configuration commands below for completion.
Verification Commands
The verification commands in EIGRP for IPv6 is almost the same as EIGRP for IPv4. All you need to change is to use IPv6 instead ordinary IP. For example, some very common commands are listed below with the output from UK-LH router in the embedded images:
What is IPv6 routing protocol?
IPv6 routing protocols use the link-local addresses for neighbor adjacency and next-hops. We can see that both interfaces have a link-local IPv6 address and are active (up/up). Just in case, let’s ping the other side just to be sure that we have connectivity:
Where to start OSI model?
Start at the bottom of the OSI-model and check if the frame-relay configuration is properly configured.
How often does R1 send hello packets?
There we go…we see that there is a mismatch in the hello parameters. R1 is configured to send hello packets each 10 seconds and R2 is configured to send them every 9 seconds. The dead timer also has a mismatch. Here’s what the timers look like:
Is OSPFv3 enabled for serial 0/0?
You can see that OSPFv3 has been enabled for the serial 0/0 interfaces. Let’s take a closer look at the OSPFv3 configuration:
Is OSPFv3 enabled on interfaces?
OSPFv3 has been enabled on the interfaces, still we don’t have any neighbors:
Can R1 and R2 form OSPFv3?
R1 and R2 are once again unable to form an OSPFv3 neighbor adjacency. Let’s check a couple of things:
Is pinging each other an issue?
Pinging each other is no issue. Is OSPFv3 running?
