I have set up LACP on a few CentOS 8 servers. But when I ping systems trough the default gateway, I get DUP! replies:
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64 bytes from server.internal.network (10.99.1.3): icmp_seq=1 ttl=64 time=0.182 ms
64 bytes from server.internal.network (10.99.1.3): icmp_seq=2 ttl=64 time=0.202 ms
64 bytes from server.internal.network (10.99.1.3): icmp_seq=3 ttl=64 time=0.058 ms
64 bytes from server.internal.network (10.99.1.3): icmp_seq=4 ttl=64 time=0.161 ms
64 bytes from server.internal.network (10.99.1.3): icmp_seq=4 ttl=64 time=0.193 ms (DUP!)
64 bytes from server.internal.network (10.99.1.3): icmp_seq=4 ttl=64 time=0.202 ms (DUP!)
64 bytes from server.internal.network (10.99.1.3): icmp_seq=5 ttl=64 time=0.155 ms
64 bytes from server.internal.network (10.99.1.3): icmp_seq=5 ttl=64 time=0.156 ms (DUP!)
64 bytes from server.internal.network (10.99.1.3): icmp_seq=5 ttl=64 time=0.171 ms (DUP!)
64 bytes from server.internal.network (10.99.1.3): icmp_seq=6 ttl=64 time=0.225 ms
64 bytes from server.internal.network (10.99.1.3): icmp_seq=6 ttl=64 time=0.244 ms (DUP!)
64 bytes from server.internal.network (10.99.1.3): icmp_seq=7 ttl=64 time=0.202 ms
64 bytes from server.internal.network (10.99.1.3): icmp_seq=7 ttl=64 time=0.210 ms (DUP!)
64 bytes from server.internal.network (10.99.1.3): icmp_seq=7 ttl=64 time=0.239 ms (DUP!)[root@server1 network-scripts]# uname -a
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Linux server1.in.nexxwave.io 4.18.0-193.14.2.el8_2.x86_64 #1 SMP Sun Jul 26 03:54:29 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
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Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0
802.3ad info
LACP rate: slow
Min links: 0
Aggregator selection policy (ad_select): stable
System priority: 65535
System MAC address: ac:1f:6b:8a:4d:2a
Active Aggregator Info:
Aggregator ID: 1
Number of ports: 2
Actor Key: 15
Partner Key: 32776
Partner Mac Address: 64:9d:99:00:d6:1d
Slave Interface: ens1f0
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 3
Permanent HW addr: ac:1f:6b:8a:4d:2a
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: none
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
system priority: 65535
system mac address: ac:1f:6b:8a:4d:2a
port key: 15
port priority: 255
port number: 1
port state: 61
details partner lacp pdu:
system priority: 32768
system mac address: 64:9d:99:00:d6:1d
oper key: 32776
port priority: 32768
port number: 8
port state: 61
Slave Interface: ens1f1
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 2
Permanent HW addr: ac:1f:6b:8a:4d:2b
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: none
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
system priority: 65535
system mac address: ac:1f:6b:8a:4d:2a
port key: 15
port priority: 255
port number: 2
port state: 61
details partner lacp pdu:
system priority: 32768
system mac address: 64:9d:99:00:d6:1d
oper key: 32776
port priority: 32768
port number: 8
port state: 61
[root@server1 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-ens1f0
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TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens1f0
UUID=fb30d218-e6d1-401c-83e2-6d99f83546f3
DEVICE=ens1f0
ONBOOT=no
---
[root@server1 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-ens1f1
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens1f1
UUID=007aa0e8-bfd8-4e87-bcb6-fec34fdf92c6
DEVICE=ens1f1
ONBOOT=no
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HWADDR=AC:1F:6B:8A:4D:2A
TYPE=Ethernet
NAME=bond0_ens1f0
UUID=b2c2d777-3562-4953-912e-4ef2d1bc7206
DEVICE=ens1f0
ONBOOT=yes
MASTER=bond0
SLAVE=yes
---
[root@server1 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-bond0_ens1f1
HWADDR=AC:1F:6B:8A:4D:2B
TYPE=Ethernet
NAME=bond0_ens1f1
UUID=1447a8a9-fd4c-400c-95ca-67fb09b625f0
DEVICE=ens1f1
ONBOOT=yes
MASTER=bond0
SLAVE=yes
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VLAN=yes
TYPE=Vlan
PHYSDEV=bond0
VLAN_ID=99
REORDER_HDR=yes
GVRP=no
MVRP=no
HWADDR=
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
IPADDR=10.99.1.7
PREFIX=23
GATEWAY=10.99.1.254
DNS1=10.99.1.254
DOMAIN=mgmt.in.nexxwave.io
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
NAME=MGMT
UUID=8ed7dd54-010c-47ee-bd1d-763d1ea34b11
DEVICE=vlan99
ONBOOT=yes