12-31-2015 09:02 AM - edited 03-08-2019 03:15 AM
There are some interfaces on the 7k, 6.2(8b). that are configured as passive, ip passive-interface eigrp 100, and those networks are not being advertised via eigrp. It's my understanding that the passive command stops neighbor relationships from forming, but will continue to advertise the connected networks. This appears to be the case with Nexus as it is with IOS.
From
"Configuring a Passive Interface for EIGRP You can configure a passive interface for EIGRP.
A passive interface does not participate in EIGRP adjacency but the network address for the interfacee remains in the EIGRP topology table."
What am I missing?
thank you,
Bill
Solved! Go to Solution.
01-02-2016 08:00 AM
Not used Nexus but as far as I am aware you still need to enable EIGRP under the interface.
So using your example above -
int vlan 3
ip router eigrp 10
ip passive-interface eigrp 10
ie. you need to run EIGRP on the interface but then make it passive with the additional command.
Just using the passive-interface command on it's own does not mean EIGRP runs on that interface.
Like I say not used Nexus but it seems the most logical explanation.
Jon
12-31-2015 09:26 AM
Your understanding is correct. The behavior is the same for both IOS and Nexus OS.
Can you post relevant configs?
01-02-2016 06:12 AM
!Command: show running-config interface Vlan3
!Time: Sat Jan 2 09:06:05 2016
version 6.2(8b)
interface Vlan3
no shutdown
ip address 10.13.2.1/24
ip passive-interface eigrp 10
ip wccp 80 redirect in
ASC7010-ASC7010-prod# sh ip eigrp neighbors
IP-EIGRP neighbors for process 10 VRF default
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 10.8.63.250 Po60 10 4w0d 4 50 0 252652
ASC7010-ASC7010-prod# sh ip eigrp topology 10.13.2.0 255.255.255.0
% IP-EIGRP (AS 10): Route not in topology table
ASC7010-ASC7010-prod# sh run | sec router
.....
router eigrp 10
distance 205 15
default-metric 1000000 100 255 1 1500
redistribute static route-map STATIC-TO-EIGRP
On the adjacent eigrp neigbor 10.8.63.250
ASC-DMVPN-Inet#sh ip route 10.13.2.0
% Subnet not in table
01-02-2016 08:00 AM
Not used Nexus but as far as I am aware you still need to enable EIGRP under the interface.
So using your example above -
int vlan 3
ip router eigrp 10
ip passive-interface eigrp 10
ie. you need to run EIGRP on the interface but then make it passive with the additional command.
Just using the passive-interface command on it's own does not mean EIGRP runs on that interface.
Like I say not used Nexus but it seems the most logical explanation.
Jon
01-02-2016 08:31 AM
I was tracking that same sort of rationale, but messed up the command and thought it wasn't available.
ASC7010-ASC7010-prod(config-if)# ip eigrp 10 ?
shutdown Shutdown EIGRP on this interface
ASC7010-ASC7010-prod(config-if)# ip eigrp 10
^
% Incomplete command at '^' marker.
It's
interface Vlan44
no shutdown
ip address 10.13.8.1/24
ip router eigrp 10
ip passive-interface eigrp 10
and that does in fact do the trick. Thanks Jon.
01-01-2016 07:14 PM
Hi Bill,
Your not missing anything!
say on the 7k you had an interface with an address of 10.10.10.1/30 then the 10.10.10.0/30 address would be advertised by EIGRP on the 7k, but any networks on the other end of the link would not.
01-02-2016 06:26 AM
Thanks Richard. It's odd, all the interfaces configured with passive are not in the topology, but sure enough all those with the router eigrp show up.
interface Vlan6
ip address 10.13.4.1/24
ip router eigrp 10
ip wccp 80 redirect in
no shutdown
ASC7010-ASC7010-prod# sh ip eigrp topology 10.13.4.0 255.255.255.0
IP-EIGRP (AS 10): Topology entry for 10.13.4.0/24
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2816
Routing Descriptor Blocks:
0.0.0.0 (Vlan6), from Connected, Send flag is 0x0
Composite metric is (2816/0), Route is Internal
Vector metric:
Minimum bandwidth is 1000000 Kbit
Total delay is 10 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 0
Internal tag is 0
01-02-2016 05:35 AM
Hi
Firstly, did you advertise this network using the network or redistribute command?
Thanks
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