eigrp

see all messages (u all - to cancel)

debug eigrp packets
debug eigrp packets query

block sending on the interface:

passive-interface eth0/1

block sending on all:

router eigrp 90
 variance 2
 network 10.1.0.0 0.0.255.255
 network 172.30.0.0
 network 192.168.1.0
 passive-interface default ← 
 no passive-interface Serial2/0
 no passive-interface Serial2/1
!

summary on EIGRP on the interface:

interface Serial2/1
 bandwidth 256
 ip address 10.1.34.1 255.255.255.252
 ip summary-address eigrp 90 172.30.0.0 255.255.248.0 ← 
 serial restart-delay 0
!

loadbalance traffic with “variance” command:

router eigrp 90
 variance 2 ← 
 network 10.1.0.0 0.0.255.255
 network 172.30.0.0
 network 192.168.1.0
 passive-interface default
 no passive-interface Serial2/0
 no passive-interface Serial2/1

split horizont change if only one interface is in game

conf t
router eigrp 25
no ip split-horizon eigrp 25

utilize 30% more bandwidth

ip bandwidth-percent eigrp 25 80 (default 50%)

configure authentication (check the clock)

conf t
key chain EIGRP_KEYS
key 1
key-string eigrp01
accept-lifetime 00:00:00 1 Jan 2020 00:00:00 30 Sep 2020
send-lifetime 00:00:00 1 Jan 2020 00:00:00 30 Sep 2020

key 2
key-string eigrp02
accept-lifetime 00:00:00 01 Nov 2020 infinite
send-lifetime 00:00:00 01 Nov 2020 infinite

int fa0/2
ip authentication mode eigrp 10 md5
ip authentication key-chain eigrp 10 EIGRP_KEYS

EIGRP IPv6 configuration

conf t
ipv6 unicast-routing
ipv6 router eigrp 10
router-id 1.1.1.1
no shutdown
end
interface s2/0
ipv6 eigrp 10
end

EIGRP named configuration

conf t
router eigrp NAMED
address-family ipv4 unicast autonomous-system 10
network 172.16.0.0 0.0.0.255
af-interface s2/0
passive-interface default
end

# or ipv6
conf t
router eigrp NAMED
address-family ipv6 autonomous-system 10
af-interface e0/1
end