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.. _eigrp:
*****
EIGRP
*****
.. glossary::
DUAL
The *Diffusing Update ALgorithm*, a :term:`Bellman-Ford` based routing
algorithm used by EIGRP.
EIGRP -- Routing Information Protocol is widely deployed interior gateway
routing protocol. EIGRP was developed in the 1990's. EIGRP is a
:term:`distance-vector` protocol and is based on the :term:`DUAL` algorithms.
As a distance-vector protocol, the EIGRP router send updates to its
neighbors as networks change, thus allowing the convergence to a
known topology.
*eigrpd* supports EIGRP as described in RFC7868
.. _starting-and-stopping-eigrpd:
Starting and Stopping eigrpd
============================
The default configuration file name of *eigrpd*'s is :file:`eigrpd.conf`. When
invocation *eigrpd* searches directory |INSTALL_PREFIX_ETC|. If
:file:`eigrpd.conf` is not there next search current directory. If an
integrated config is specified configuration is written into :file:`frr.conf`.
The EIGRP protocol requires interface information maintained by *zebra* daemon.
So running *zebra* is mandatory to run *eigrpd*. Thus minimum sequence for
running EIGRP is:
::
# zebra -d
# eigrpd -d
Please note that *zebra* must be invoked before *eigrpd*.
To stop *eigrpd*, please use::
kill `cat /var/run/frr/eigrpd.pid`
Certain signals have special meanings to *eigrpd*.
+------------------+-----------------------------------------------------------+
| Signal | Meaning |
+==================+===========================================================+
| SIGHUP & SIGUSR1 | Rotate the log file |
+------------------+-----------------------------------------------------------+
| SIGINT & SIGTERM | Sweep all installed EIGRP routes and gracefully terminate |
+------------------+-----------------------------------------------------------+
*eigrpd* invocation options. Common options that can be specified
(:ref:`common-invocation-options`).
.. program:: eigrpd
.. _eigrp-configuration:
EIGRP Configuration
===================
.. clicmd:: router eigrp (1-65535) [vrf NAME]
The `router eigrp` command is necessary to enable EIGRP. To disable EIGRP,
use the `no router eigrp (1-65535)` command. EIGRP must be enabled before
carrying out any of the EIGRP commands. Specify vrf NAME if you want
eigrp to work within the specified vrf.
.. clicmd:: network NETWORK
Set the EIGRP enable interface by `network`. The interfaces which
have addresses matching with `network` are enabled.
This group of commands either enables or disables EIGRP interfaces between
certain numbers of a specified network address. For example, if the
network for 10.0.0.0/24 is EIGRP enabled, this would result in all the
addresses from 10.0.0.0 to 10.0.0.255 being enabled for EIGRP. The `no
network` command will disable EIGRP for the specified network.
Below is very simple EIGRP configuration. Interface `eth0` and
interface which address match to `10.0.0.0/8` are EIGRP enabled.
.. code-block:: frr
!
router eigrp 1
network 10.0.0.0/8
!
.. clicmd:: passive-interface (IFNAME|default)
This command sets the specified interface to passive mode. On passive mode
interface, all receiving packets are ignored and eigrpd does not send either
multicast or unicast EIGRP packets except to EIGRP neighbors specified with
`neighbor` command. The interface may be specified as `default` to make
eigrpd default to passive on all interfaces.
The default is to be passive on all interfaces.
.. _how-to-announce-eigrp-route:
How to Announce EIGRP route
===========================
Redistribute routes into EIGRP:
.. clicmd:: redistribute <babel|bgp|connected|isis|kernel|openfabric|ospf|rip|sharp|static|table> [metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)]
The ``redistribute`` family of commands imports routing information from
other sources into EIGRP's tables. Redistribution may be disabled with the
``no`` form of the commands.
Note that connected routes on interfaces EIGRP is enabled on are announced
by default.
Optionally, various EIGRP metrics may be specified. These metrics will be
applied to the imported routes.
.. _show-eigrp-information:
Show EIGRP Information
======================
.. clicmd:: show ip eigrp [vrf NAME] topology
Display current EIGRP status.
::
eigrpd> **show ip eigrp topology**
# show ip eigrp topo
EIGRP Topology Table for AS(4)/ID(0.0.0.0)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply
r - reply Status, s - sia Status
P 10.0.2.0/24, 1 successors, FD is 256256, serno: 0
via Connected, enp0s3
.. clicmd:: show ip eigrp [vrf NAME] interface
Display the list of interfaces associated with a particular eigrp
instance.
.. clicmd:: show ip eigrp [vrf NAME] neighbor
Display the list of neighbors that have been established within
a particular eigrp instance.
EIGRP Debug Commands
====================
Debug for EIGRP protocol.
.. clicmd:: debug eigrp packets
Debug eigrp packets
``debug eigrp`` will show EIGRP packets that are sent and received.
.. clicmd:: debug eigrp transmit
Debug eigrp transmit events
``debug eigrp transmit`` will display detailed information about the EIGRP
transmit events.
.. clicmd:: show debugging eigrp
Display *eigrpd*'s debugging option.
``show debugging eigrp`` will show all information currently set for eigrpd
debug.
Sample configuration
====================
.. code-block:: frr
hostname eigrpd
password zebra
enable password please-set-at-here
!
router eigrp 4453
network 192.168.1.0/24
!
log stdout
|
