EIGRP Update message w/ infinity metric not sent upon no network x.x.x.x/yy command

[taspelund]

Things you may try first

(put "x" in "[ ]" if you already tried following)

• Did you check if this is a duplicate issue?
• Did you test it on the latest FRRouting/frr master branch?

Description

eigrpd does not send out Update messages with infinity metric to withdraw route upon removal of connected network via no network x.x.x.x/yy.

Steps to Reproduce

1. Bring up EIGRP adjacency between two routers
2. Advertise loopback from local router using network x.x.x.x/yy
3. Issue no network x.x.x.x/yy
4. pcap between routers shows no EIGRP update message

Expected behavior:
Update is sent with infinity metric to poison the route and get it removed from topology table.

Actual behavior:
No Update message is sent.

Components

eigrpd

Versions

• OS: Cumulus Linux VX 3.7.2
• Kernel: Linux 4.1.0-cl-7-amd64
• FRR: 4.0+cl3u8

Attachments

.pcap attached (rename to .pcap)
eigrp.pcap.txt

Console session w/ timestamps:

root@leaf01:~# vtysh -c "conf t" -c "router eigrp 10" -c "net 1.1.1.1/32"
root@leaf01:~# vtysh -c "show run"
Building configuration...

Current configuration:
!
frr version 4.0+cl3u8
frr defaults datacenter
hostname leaf01
username cumulus nopassword
!
service integrated-vtysh-config
!
log syslog
!
router eigrp 10
 network 1.1.1.1/32 
 network 10.0.0.0/8 
!
line vty
!
end
root@leaf01:~# 
root@leaf01:~# date; vtysh -c "conf t" -c "router eigrp 10" -c "no net 1.1.1.1/32"
Wed Jan 30 15:58:59 UTC 2019
root@leaf01:~# date; vtysh -c "show run"
Wed Jan 30 15:59:04 UTC 2019
Building configuration...

Current configuration:
!
frr version 4.0+cl3u8
frr defaults datacenter
hostname leaf01
username cumulus nopassword
!
service integrated-vtysh-config
!
log syslog
!
router eigrp 10
 network 10.0.0.0/8 
!
line vty
!
end