ipv6 router eigrp VS router eigrp + address-family ipv6
I am confused, what are the differences between these two?
Cisco doc for EIGRP IPv6 is using "ipv6 router eigrp"
But if you look at INEv5 Foundation Lab 2 8.1 for EIGRP IPv6, it is using "router eigrp + address-family ipv6"
Any help would be appreciated!
Comments
It must be some kind of typo in the lab requirement, there is no IPv6 address family under the IPv4 EIGRP process:
R1(config)#router e 90
R1(config-router)#address-family ?
ipv4 Address Family IPv4
R1(config-router)#
Did you look at the solution to check? I'd go there but I doubt this is not a typo
There is ipv6 if you use EIGRP name mode
router eigrp NAMEMODE
When reading Cisco Documentation you must always verify the "Components Used" section to make sure thatthey are relevant to your task.
The configurations in this document are based on the Cisco 3700 series
router on Cisco IOS Software Release 12.4 (15)T 13.
The INE Foundation Labs for CCIE R&Sv5 are refering to the use of IOS 15.2 M&T
Whereas in the 15.2 IOS does support both EIGRP Named and classic mode, the particular Lab is referring to Named mode.
Check out http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-enhanced-igrp.html#GUID-B771ED4F-7883-4EDD-9D26-D6A6506AEFA4
When reading Cisco Documentation you must always verify the "Components Used" section to make sure that they are relevant to your task.
The configurations in this document are based on the Cisco 3700 series router on Cisco IOS Software Release 12.4 (15)T 13.
The INE Foundation Labs for CCIE R&Sv5 are refering to the use of IOS 15.2 M&T
Whereas in the 15.2 IOS does support both EIGRP Named and classic mode, the particular Lab is referring to Named mode.
Check out http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-enhanced-igrp.html#GUID-B771ED4F-7883-4EDD-9D26-D6A6506AEFA4
Oh, well you are talking about classic mode in your question... named mode is a different story. Named mode is supposed to be a neutral EIGRP process within which you pick your IP family. Classic mode is either IPv4 or IPv6.
I think Cisco's plan is to eventually phase out the classic mode configuration and keep the named mode only but things like this are done slowly so for now you have both modes available.
router eigrp X and ipv6 router eigrp X are classic mode for IPv4 and IPv6 respectively
router eigrp NAME does not define IPv4 or IPv6, simply a process within which you have to specify your desired address family
Hope that helps
That sounds like there are no differences between these two.
Thanks for the quick responses.
NOTE: if we place these threads in the sub-forum (foundation lab 2),
then future candidates may find the answer to their similar
questions.
Hi tearofs,
Not exactly. Take a look at the below output for the two different configs.
They will become neighbors with each other, but notice any differences with the metrics? These loopbacks are the same exact distance from each other.
============================================
R1# sh ipv6 protocol
<snip>
IPv6 Routing Protocol is "eigrp 12"
EIGRP-IPv6 VR(NAMED) Address-Family Protocol for AS(12)
Metric weight K1=1, K2=0, K3=1, K4=0, K5=0 K6=0
Metric rib-scale 128 <--- !!!!!
Metric version 64bit <--- !!!!!
NSF-aware route hold timer is 240
Router-ID: 1.1.1.1
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 16
Maximum hopcount 100
Maximum metric variance 1
Total Prefix Count: 3
Total Redist Count: 0
Interfaces:
FastEthernet0/0
Loopback0
Redistribution:
None
R2# sh ipv6 protocol
<snip>
IPv6 Routing Protocol is "eigrp 12"
EIGRP-IPv6 Protocol for AS(12)
Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
NSF-aware route hold timer is 240
Router-ID: 2.2.2.2
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 16
Maximum hopcount 100
Maximum metric variance 1
Interfaces:
FastEthernet0/0
Loopback0
Redistribution:
None
============================================
R1# sh ipv6 route 2222::2:2:2:2
Routing entry for 2222::2:2:2:2/128
Known via "eigrp 12", distance 90, metric 2662400, type internal
Route count is 1/1, share count 0
Routing paths:
FE80::C802:41FF:FE60:8, FastEthernet0/0
Last updated 00:03:20 ago
R2# sh ipv6 route 1111::1:1:1:1
Routing entry for 1111::1:1:1:1/128
Known via "eigrp 12", distance 90, metric 28160, type internal
Route count is 1/1, share count 0
Routing paths:
FE80::1, FastEthernet0/0
Last updated 00:03:58 ago
============================================
R1# sh ipv6 eigrp topology 2222::2:2:2:2/128
EIGRP-IPv6 VR(NAMED) Topology Entry for AS(12)/ID(1.1.1.1) for 2222::2:2:2:2/128
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 340787200, RIB is 2662400
Descriptor Blocks:
FE80::2 (FastEthernet0/0), from FE80::2, Send flag is 0x0
Composite metric is (340787200/327761920), route is Internal
Vector metric:
Minimum bandwidth is 100000 Kbit
Total delay is 5100000000 picoseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1
Originating router is 2.2.2.2
R2# sh ipv6 eigrp topology 1111::1:1:1:1/128
EIGRP-IPv6 Topology Entry for AS(12)/ID(2.2.2.2) for 1111::1:1:1:1/128
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 28160
Descriptor Blocks:
FE80::1 (FastEthernet0/0), from FE80::1, Send flag is 0x0
Composite metric is (28160/256), route is Internal
Vector metric:
Minimum bandwidth is 100000 Kbit
Total delay is 101 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1
Originating router is 1.1.1.1
This is good, thanks Joe!