12-26-2013 11:52 AM - edited 03-07-2019 05:15 PM
It appears EIGRP only sends the classic-scale-metrics while operating in non-named configuration mode (E.G. router eigrp # ) AND Always sends the wide-metric format while operating in Named Configuration mode (E.G. router eigrp ROCKS) regardless of the 15.2 IOS version.
When my router is running in Named config mode, sh eigrp protocols reveals K6=0,
when I remove the Named config and use the legacy router eigrp # config mode, the same sh eigrp protocols does not list the K6=0 value (only K1 - K5).
The reason I ask is the Cisco white paper (EIGRP Wide Metrics) dated Nov 2012, states if a legacy EIGRP peer is interfacing with a new EIGRP peer, the new EIGRP peer will send both formats. - Is this doc outdated by a newer doc?
Thanks
Frank
12-27-2013 09:47 AM
Oops, here is the Cisco White Paper I referred in my original post.
Thanks
Frank
12-31-2013 09:28 AM
Update- The original title should be referred to as EIGRP Virtual-Instance (that does support the legacy 32-bit metric and just might also support the 64-bit wide metrics; depending on your configuration).
Viewing the show command (Show command 1) based on EXAMPLE CONFIG 1 below, it's clear the K6 value is not used; only the K1 - K5 values.
If address-family vrf was implemented, as shown in EXAMPLE 2, it's clear the new wide-metric is in effect.
The question still remains, how does an EIGRP peer configured to recognize link speeds greater than 10Gbps interact with EIGRP peers that are not operating in 64-bit mode? What do the configurations look like for each of the peers?
ANYONE know?
Thanks
Frank
EXAMPLE CONFIG 1:
router eigrp TEN-GIG
!
address-family ipv4 unicast autonomous-system 200
!
topology base
exit-af-topology
network 192.168.1.1 0.0.0.255
exit-address-family
!
service-family ipv4 autonomous-system 200
!
sf-interface GigabitEthernet0/1
authentication mode md5
authentication key-chain MD5-PASS
exit-sf-interface
!
topology base
exit-sf-topology
exit-service-family
SHOW COMMAND 1:
R40#sh eigrp protocols
EIGRP-IPv4 VR(TEN-GIG) Address-Family Protocol for AS(200)
Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
NSF-aware route hold timer is 240
Router-ID: 10.74.10.5
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 4
Maximum hopcount 100
Maximum metric variance 1
Total Prefix Count: 6
Total Redist Count: 0
EIGRP-SFv4 VR(TEN-GIG) Service-Family Protocol for AS(200)
Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
NSF-aware route hold timer is 240
Router-ID: 10.74.10.5
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 1
Maximum hopcount 100
Maximum metric variance 1
Total Prefix Count: 0
Total Redist Count: 0
EXAMPLE 2:
R-64-bit#sh ip eigrp vrf DMZ topology 192.168.1.0 255.255.255.0
EIGRP-IPv4 VR(DMZ) Topology Entry for AS(200)/ID(10.74.10.5)
Topology(base) TID(0) VRF(DMZ)
EIGRP-IPv4(200): Topology base(0) entry for 192.168.1.0/24
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 1310720, RIB is 10240
Descriptor Blocks:
192.168.1.1 (GigabitEthernet0/1), from 192.168.1.2, Send flag is 0x0
Composite metric is (1310720/65536), route is Internal
Vector metric:
Minimum bandwidth is 1000000 Kbit
Total delay is 10000000 picoseconds
Reliability is 0/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1
01-02-2014 05:51 AM
Finally figured it out!!!
R39#sh eigrp protocols
EIGRP-IPv4 VR(wide) Address-Family Protocol for AS(200)
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: --snip--
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 4
Maximum hopcount 100
Maximum metric variance 1
Total Prefix Count: 14
Total Redist Count: 0
02-04-2016 12:04 AM
With the introduction of wide metrics, the TLV packets were updated to carry additional information. EIGRP was modified to send both the older packet formats and the newer ones in a mixed network. Sending twice the data will impact link utilization and performance.
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