Hi guys,
within my Multi-Pod (2 Pods) environment I got an overlapping IP which belongs to the external TEP-Pool from Pod 2. This fabric is not in production yet.
Informations:
- external TEP-Pool Pod 2: 172.20.12.0/24
- Data Plane IP: 172.20.12.1
- Spine 221 IP: 172.20.12.2
- Spine 222 IP: 172.20.12.3
Fault F1425 raised:
# fault.Inst
code : F1425
ack : no
alert : no
annotation :
cause : ip-provisioning-failed
changeSet : ipv4CfgFailedBmp (New: ipv4:Addraddr_failed_flag,ipv4:Addrctrl_failed_flag,ipv4:AddrlcOwn_failed_flag,ipv4:AddrmodTs_failed_flag,ipv4:AddrmonPolDn_failed_flag,ipv4:Addrpref_failed_flag,ipv4:Addrtag_failed_flag,ipv4:Addrtype_failed_flag,ipv4:AddrvpcPeer_failed_flag), ipv4CfgState (New: 1), operStQual (New: subnet-overlap)
childAction :
created : 2025-07-23T18:13:28.259+02:00
delegated : no
descr : IPv4 address(172.20.12.2/32) is operationally down, reason:Subnet overlap on node 221 fabric hostname ZDITBSW221-SP
dn : topology/pod-2/node-221/sys/ipv4/inst/dom-overlay-1/if-[lo6]/addr-[172.20.12.2/32]/fault-F1425
domain : access
extMngdBy : undefined
highestSeverity : major
lastTransition : 2025-07-23T18:15:30.654+02:00
lc : raised
modTs : never
occur : 1
origSeverity : major
prevSeverity : major
rn : fault-F1425
rule : ipv4-addr-oper-st-down
severity : major
status :
subject : oper-state-err
title :
type : operational
uid :
userdom : all
Loopback Interfaces on Spines
Spine 221:
lo0 172.24.164.66/32 protocol-up/link-up/admin-up
lo1 172.20.12.1/32 protocol-up/link-up/admin-up
lo2 172.20.12.2/32 protocol-up/link-up/admin-up
lo3 172.24.0.64/32 protocol-up/link-up/admin-up
lo4 172.20.12.229/32 protocol-up/link-up/admin-up
lo5 172.20.12.230/32 protocol-up/link-up/admin-up
lo7 172.24.128.33/32 protocol-up/link-up/admin-up
lo8 172.24.128.34/32 protocol-up/link-up/admin-up
lo9 172.24.128.35/32 protocol-up/link-up/admin-up
lo10 172.24.0.66/32 protocol-up/link-up/admin-up
lo11 172.24.192.70/32 protocol-up/link-up/admin-up
lo12 172.24.0.65/32 protocol-up/link-up/admin-up
lo13 172.24.192.69/32 protocol-up/link-up/admin-up
lo14 172.24.192.71/32 protocol-up/link-up/admin-up
Spine 222:
lo0 172.24.164.64/32 protocol-up/link-up/admin-up
lo1 172.20.12.1/32 protocol-up/link-up/admin-up
lo2 172.20.12.3/32 protocol-up/link-up/admin-up
lo3 172.24.0.64/32 protocol-up/link-up/admin-up
lo4 172.20.12.229/32 protocol-up/link-up/admin-up
lo5 172.20.12.230/32 protocol-up/link-up/admin-up
lo6 172.20.12.2/32 protocol-up/link-up/admin-up
lo7 172.24.128.33/32 protocol-up/link-up/admin-up
lo8 172.24.128.34/32 protocol-up/link-up/admin-up
lo9 172.24.128.35/32 protocol-up/link-up/admin-up
lo10 172.24.0.65/32 protocol-up/link-up/admin-up
lo11 172.24.192.65/32 protocol-up/link-up/admin-up
lo12 172.24.0.66/32 protocol-up/link-up/admin-up
lo13 172.24.192.66/32 protocol-up/link-up/admin-up
lo14 172.24.192.67/32 protocol-up/link-up/admin-up
Output from the APIC (moquery -c ipv4Addr):
# ipv4.Addr
addr : 172.20.12.2/32
childAction :
ctrl :
dn : topology/pod-2/node-221/sys/ipv4/inst/dom-overlay-1/if-[lo2]/addr-[172.20.12.2/32]
ipv4CfgFailedBmp :
ipv4CfgFailedTs : 00:00:00:00.000
ipv4CfgState : 0
lcOwn : local
modTs : 2025-07-23T18:13:29.721+02:00
monPolDn :
operSt : up
operStQual : up
pref : 0
rn : addr-[172.20.12.2/32]
status :
tag : 0
type : primary
vpcPeer : 0.0.0.0
# ipv4.Addr
addr : 172.20.12.2/32
childAction :
ctrl :
dn : topology/pod-2/node-221/sys/ipv4/inst/dom-overlay-1/if-[lo6]/addr-[172.20.12.2/32]
ipv4CfgFailedBmp : ipv4:Addraddr_failed_flag,ipv4:Addrctrl_failed_flag,ipv4:AddrlcOwn_failed_flag,ipv4:AddrmodTs_failed_flag,ipv4:AddrmonPolDn_failed_flag,ipv4:Addrpref_failed_flag,ipv4:Addrtag_failed_flag,ipv4:Addrtype_failed_flag,ipv4:AddrvpcPeer_failed_flag
ipv4CfgFailedTs : 00:00:00:00.000
ipv4CfgState : 1
lcOwn : local
modTs : 2025-07-23T18:13:27.150+02:00
monPolDn : uni/fabric/monfab-default
operSt : down
operStQual : subnet-overlap
pref : 0
rn : addr-[172.20.12.2/32]
status :
tag : 0
type : primary
vpcPeer : 0.0.0.0
# ipv4.Addr
addr : 172.20.12.2/32
childAction :
ctrl :
dn : topology/pod-2/node-222/sys/ipv4/inst/dom-overlay-1/if-[lo6]/addr-[172.20.12.2/32]
ipv4CfgFailedBmp :
ipv4CfgFailedTs : 00:00:00:00.000
ipv4CfgState : 0
lcOwn : local
modTs : 2025-07-23T18:13:25.032+02:00
monPolDn : uni/fabric/monfab-default
operSt : up
operStQual : up
pref : 0
rn : addr-[172.20.12.2/32]
status :
tag : 0
type : primary
vpcPeer : 0.0.0.0
How can this be fixed? Found no hint.
Thank you very much!
Cheers,
Danny
