That’s right, it should stop it from sending ARP packets to a backup router. You do not need to enable portfast, portfast puts the ports into forwarding mode right away, rather than the normal learning process. Typically this is only enabled on edge devices that connect directly to client devices. 

Hi,

It is probably because the port channel is going to each of the VRRP switches, so some traffic is getting sent to the backup VRRP router. If you don’t have the port channel and just had individual links going to each switch it probably would not give the errors. 

Hi Josh,

Thanks for your advice.

I just need to disable the port channel link aggregation on DELL 6224F switch for the 2 ports connected to both of the DELL N3024F switch. Is this right?

Do I need to enable auto portfast on both DELL 6224F & N3024F switches?

Thanks for your kind support.

Hi Josh,

Thanks for your valuable advice and time.

I tried to configured the 2 ports on DELL 6224F which is connected to DELL N3024F switches.

But, I found that both ports is not member of any port-channel, although under #show interfaces configuration, the Link Aggregate is shown as Admin state - Up. 

console#show interfaces configuration

Port Type Duplex Speed Neg Admin
State
----- ------------------------------ ------ ------- ---- -----
1/g1 Gigabit - Level Full 1000 Auto Up
1/g2 Gigabit - Level N/A Unknown Auto Up
1/g3 Gigabit - Level N/A Unknown Auto Up
1/g4 Gigabit - Level Full 1000 Auto Up
1/g5 Gigabit - Level N/A Unknown Auto Up
1/g6 Gigabit - Level N/A Unknown Auto Up
1/g7 Gigabit - Level N/A Unknown Auto Up
1/g8 Gigabit - Level N/A Unknown Auto Up
1/g9 Gigabit - Level N/A Unknown Auto Up
1/g10 Gigabit - Level Full 1000 Auto Up
1/g11 Gigabit - Level N/A Unknown Auto Up
1/g12 Gigabit - Level N/A Unknown Auto Up
1/g13 Gigabit - Level N/A Unknown Auto Up
1/g14 Gigabit - Level N/A Unknown Auto Up
1/g15 Gigabit - Level N/A Unknown Auto Up
1/g16 Gigabit - Level N/A Unknown Auto Up
1/g17 Gigabit - Level Full 1000 Auto Up
1/g18 Gigabit - Level Full 1000 Auto Up
1/g19 Gigabit - Level Full 1000 Auto Up
--More-- or (q)uit
1/g20 Gigabit - Level Full 1000 Auto Up
1/g21 Gigabit - Level Full 100 Auto Up
1/g22 Gigabit - Level Full 100 Auto Up
1/g23 Gigabit - Level Full 100 Auto Up
1/g24 Gigabit - Level Full 100 Auto Up
1/xg1 10G - Level N/A Unknown Auto Up
1/xg2 10G - Level N/A Unknown Auto Up
1/xg3 10G - Level N/A Unknown Auto Up
1/xg4 10G - Level N/A Unknown Auto Up
2/g1 Gigabit - Level Full 1000 Auto Up
2/g2 Gigabit - Level N/A Unknown Auto Up
2/g3 Gigabit - Level Full 1000 Auto Up
2/g4 Gigabit - Level N/A Unknown Auto Up
2/g5 Gigabit - Level N/A Unknown Auto Up
2/g6 Gigabit - Level N/A Unknown Auto Up
2/g7 Gigabit - Level Full 1000 Auto Up
2/g8 Gigabit - Level N/A Unknown Auto Up
2/g9 Gigabit - Level Full 1000 Auto Up
2/g10 Gigabit - Level N/A Unknown Auto Up
2/g11 Gigabit - Level N/A Unknown Auto Up
2/g12 Gigabit - Level N/A Unknown Auto Up
2/g13 Gigabit - Level N/A Unknown Auto Up
2/g14 Gigabit - Level N/A Unknown Auto Up
--More-- or (q)uit
2/g15 Gigabit - Level N/A Unknown Auto Up
2/g16 Gigabit - Level N/A Unknown Auto Up
2/g17 Gigabit - Level Full 1000 Auto Up
2/g18 Gigabit - Level N/A Unknown Auto Up
2/g19 Gigabit - Level Full 1000 Auto Up
2/g20 Gigabit - Level Full 1000 Auto Up
2/g21 Gigabit - Level Full 100 Auto Up
2/g22 Gigabit - Level Full 100 Auto Up
2/g23 Gigabit - Level N/A Unknown Auto Up
2/g24 Gigabit - Level Half 10 Auto Up
2/xg1 10G - Level N/A Unknown Auto Up
2/xg2 10G - Level N/A Unknown Auto Up
2/xg3 10G - Level N/A Unknown Auto Up
2/xg4 10G - Level N/A Unknown Auto Up

Ch Type Admin
State
--- ------------------------------ -----
ch1 Link Aggregate Up
ch2 Link Aggregate Up
ch3 Link Aggregate Up
ch4 Link Aggregate Up
--More-- or (q)uit
ch5 Link Aggregate Up
ch6 Link Aggregate Up
ch7 Link Aggregate Up
ch8 Link Aggregate Up
ch9 Link Aggregate Up
ch10 Link Aggregate Up
ch11 Link Aggregate Up
ch12 Link Aggregate Up
ch13 Link Aggregate Up
ch14 Link Aggregate Up
ch15 Link Aggregate Up
ch16 Link Aggregate Up
ch17 Link Aggregate Up
ch18 Link Aggregate Up
ch19 Link Aggregate Up
ch20 Link Aggregate Up
ch21 Link Aggregate Up
ch22 Link Aggregate Up
ch23 Link Aggregate Up
ch24 Link Aggregate Up
ch25 Link Aggregate Up
ch26 Link Aggregate Up
ch27 Link Aggregate Up
--More-- or (q)uit
ch28 Link Aggregate Up
ch29 Link Aggregate Up
ch30 Link Aggregate Up
ch31 Link Aggregate Up
ch32 Link Aggregate Up
ch33 Link Aggregate Up
ch34 Link Aggregate Up
ch35 Link Aggregate Up
ch36 Link Aggregate Up
ch37 Link Aggregate Up
ch38 Link Aggregate Up
ch39 Link Aggregate Up
ch40 Link Aggregate Up
ch41 Link Aggregate Up
ch42 Link Aggregate Up
ch43 Link Aggregate Up
ch44 Link Aggregate Up
ch45 Link Aggregate Up
ch46 Link Aggregate Up
ch47 Link Aggregate Up
ch48 Link Aggregate Up

Flow Control:Enabled

Here's the interface detail for 1/g1 & 2/g1:

console#show interfaces detail ethernet 1/g1

Port Type Duplex Speed Neg Admin Link
State State
----- ------------------------------ ------ ------- ---- ----- -----
1/g1 Gigabit - Level Full 1000 Auto Up Up

Port Description
---- --------------------------------------------------------------------------
1/g1

Flow Control:Enabled
Port: 1/g1
VLAN Membership mode:Access Mode

Operating parameters:
PVID: 1
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged
Default Priority: 0
GVRP status:Disabled
Protected:Disabled

--More-- or (q)uit
Port 1/g1 is member in:

VLAN Name Egress rule Type
---- --------------------------------- ----------- --------
1 Default Untagged Default

Static configuration:
PVID: 1
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged

Port 1/g1 is statically configured to:

VLAN Name Egress rule
---- --------------------------------- -----------

Forbidden VLANS:
VLAN Name
---- ---------------------------------

Port 1/g1 Enabled
State: Forwarding Role: Designated
--More-- or (q)uit
Port id: 128.1 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 80:00:5C:26:0A:FB:B5:9D
Designated port id: 128.1 Designated path cost: 40000
CST Regional Root: 80:00:5C:26:0A:FB:B5:9D CST Port Cost: 0
BPDU: sent 1107868, received 133

console#show interfaces detail ethernet 2/g1

Port Type Duplex Speed Neg Admin Link
State State
----- ------------------------------ ------ ------- ---- ----- -----
2/g1 Gigabit - Level Full 1000 Auto Up Up

Port Description
---- --------------------------------------------------------------------------
2/g1

Flow Control:Enabled
Port: 2/g1
VLAN Membership mode:Access Mode

Operating parameters:
PVID: 1
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged
Default Priority: 0
GVRP status:Disabled
Protected:Disabled

--More-- or (q)uit
Port 2/g1 is member in:

VLAN Name Egress rule Type
---- --------------------------------- ----------- --------
1 Default Untagged Default

Static configuration:
PVID: 1
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged

Port 2/g1 is statically configured to:

VLAN Name Egress rule
---- --------------------------------- -----------

Forbidden VLANS:
VLAN Name
---- ---------------------------------

Port 2/g1 Enabled
State: Forwarding Role: Designated
--More-- or (q)uit
Port id: 128.53 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 80:00:5C:26:0A:FB:B5:9D
Designated port id: 128.53 Designated path cost: 40000
CST Regional Root: 80:00:5C:26:0A:FB:B5:9D CST Port Cost: 0
BPDU: sent 804242, received 82

Next, I did a #show spanning-tree port-channel detail, the results for the 2 ports as follow:

Spanning tree Enabled (BPDU flooding : Disabled) Portfast BPDU filtering Disabled mode rstp
CST Regional Root: 80:00:5C:26:0A:FB:B5:9D
Regional Root Path Cost: 0
ROOT ID
Address 00:0A:DC:6D:43:40
Path Cost 40000
Root Port 1/g19
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Bridge ID
Priority 32768
Address 80:00:5C:26:0A:FB:B5:9D
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec

Number of topology changes 4694 last change occurred 0d2h17m49s ago
Times: hold 6, hello 2, max age 20, forward delay 15

Port 1/g1 Enabled
State: Forwarding Role: Designated
Port id: 128.1 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 5C:26:0A:FB:B5:9D
Designated port id: 128.1 External path cost: 20000
CST Regional Root: 80:00:5C:26:0A:FB:B5:9D CST Port Cost: 0
--More-- or (q)uit
BPDU: sent 1108017, received 133

Port 2/g1 Enabled
State: Forwarding Role: Designated
Port id: 128.53 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 5C:26:0A:FB:B5:9D
Designated port id: 128.53 External path cost: 20000
CST Regional Root: 80:00:5C:26:0A:FB:B5:9D CST Port Cost: 0
BPDU: sent 804408, received 82

Last, I did a #show tech-support

from the "Show Isdp Neighbors", it knows of the N3204F switch as follow:

***************** Show Isdp Neighbors *****************

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge,
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Intf Holdtime Capability Platform Port ID
---------------------- ------- --------- ------------ -------------------- ----------------------
CN0WKWF42829859G0004A0 1/g1 171 R N3024F Gi1/0/2
CN0FN848282982390047A1 1/g17 173 R PCT6224F 1/0/17
CN0FN8482829829H0024A1 1/g18 172 R PCT6224F 1/0/16
CN0FN848282982390040A1 1/g19 153 R PCT6224F 1/0/12
CN0FN848282982390026A1 1/g20 160 R PCT6224F 1/0/13
CN0WKWF4282985AA0044A0 2/g1 149 R N3024F Gi1/0/2
CN0FN848282982390039A1 2/g17 173 R PCT6224F 1/0/17
CN0FN848282982390027A1 2/g19 175 R PCT6224F 1/0/12
CN0FN848282982390050A1 2/g20 177 R PCT6224F 1/0/13

Sorry for my limited knowledge of the proper CLI  and configuration for L3 managed switches; 

How do I proceed to configure the 2 specific ports for connection to 2 x N3024F switch (VRRP routing enabled)?

I need to resolve this problem as its giving me nightmares whenever the 2 port is disabled.

The DELL 6224F switch was not configured by me as it was done by a previous vendor.

The 2 x new DELL N3024F switches is added to support new windows 2012 servers and network data concentrators.

From 1 of the N3024F switch config:

No Configured Ports for Port-channel

 ***************** Show Storm-control *****************

802.3x Flow Control Mode....................... Enable

        Bcast Bcast Mcast Mcast Ucast Ucast Flow
Port Mode Level Mode Level Mode Level Ctrl
---------- -------- --------- -------- --------- -------- --------- ----------
Gi1/0/1 Disable 5 Disable 5 Disable 5 Enabled
Gi1/0/2 Disable 5 Disable 5 Disable 5 Enabled

***************** Show PVST/RPVST Summary *****************
Neither PVST nor Rapid-PVST is enabled

***************** Show Spanning-tree *****************
Spanning Tree: Enabled - BPDU Flooding: Disabled - Portfast BPDU Filtering: Disabled
Mode: rstp
CST Regional Root: 80:00:F8:B1:56:97:67:12
Regional Root Path Cost: 0
ROOT ID
Priority 32768
Address 000A.DC6D.4340
Path Cost 60000
Root Port Gi1/0/2
Hello Time: 2s Max Age: 20s Forward Delay: 15s Transmit Hold Count: 6s
Bridge Max Hops: 20
Bridge ID
Priority 32768
Address F8B1.5697.6712
Hello Time: 2s Max Age: 20s Forward Delay: 15s
Interfaces

Name State Prio.Nbr Cost Sts Role Restricted
--------- -------- --------- --------- ---- ----- ----------
Gi1/0/1 Enabled 128.1 0 DIS Disb No
Gi1/0/2 Enabled 128.2 20000 FWD Root No

***************** Show Isdp Neighbors *****************

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge,
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Intf Holdtime Capability Platform Port ID
------------------------ --------- --------- ---------- ---------------- ---------
CN0FN848282982390042A16 Gi1/0/2 175 R PCT6224F 2/0/1

***************** Show Lldp Remote-device All ***********

LLDP Remote Device Summary

Local
Interface RemID Chassis ID Port ID System Name
--------- ------- ------------------- ----------------- -----------------
Gi1/0/2 1 5C:26:0A:FB:B5:9D 2/0/1

Thanks for your kind support and assistance.

Regards,

George

Can you post the VRRP config from the N3024s? Is it always the same port that gets disabled? The ARP request is getting sent to 255.255.255.255 which is what happens when it doesn’t know where to send the packet. Is the default gateway on the 6224s set to the IP of the VRRP IP?

Hi Josh,

Thanks for your kind assistance.

Here's the configuration of the DELL N3024F switch:

***************** Show Running Config ***********

!Current Configuration:
!Software Capability "ACCESS ROUTER"
!Image File "N3000_N2000v6.3.0.9"
!System Description "Dell Networking N3024F, 6.3.0.9, Linux 3.6.5-7dc37651"
!System Software Version 6.3.0.9
!
configure
vlan 4
exit
slot 1/0 2    ! Dell Networking N3024F
sntp unicast client enable
sntp server "pool.ntp.org" priority 3
stack
member 1 2    ! N3024F
exit
logging console errors
ip routing
interface vlan 1
ip address 172.168.1.1 255.255.255.0
exit
interface vlan 4
ip address 172.168.4.1 255.255.255.0
exit
ip vrrp
application install hiveagent start-on-boot
!
interface Gi1/0/1
switchport mode trunk
exit
!
interface Gi1/0/2
no spanning-tree auto-portfast
exit
interface vlan 1
vrrp 1
vrrp 1 mode
vrrp 1 ip 172.168.1.254
exit
interface vlan 4
vrrp 4
vrrp 4 mode
vrrp 4 ip 172.168.4.254
exit
snmp-server engineid local 800002a203f8b156976712
exit

Regards,

George

Hi Josh,

I just confirmed that all my devices is configured with gateway: 172.168.1.254.

All my new server has 2 NIC configured for teaming, switch independent / dynamic mode.

All my new data concentrators has 2 physical Ethernet port for team bonding.

The ARP messages is from all my data concentrators virtual IP (Hot / Warm IP).

I have configured gateway as 172.168.1.254 for both the physical & virtual interface.

1 additional question:

The VRRP IP: 172.168.1.254 & 172.168.4.254 does not respond to PING request, is this normal?

Both the vlan interface IP do respond to PING request from network devices.

Regards,

George

By default it is not pingable page 1885 

Hi Josh,

The ARP error message is still in progress even after I confirm that all device gateway is configured to 172.168.1.254, same as our VRRP IP address.

What could be the issues if ARP is still broadcasting to 255.255.255.255?

Could this be an device problem? Does my configuration  for DELL N3024F or 6224F need to modified to resolve the issues?

Thanks for your kind advice and understanding.

Regards,

George

Have you tried disconnecting the cable or shutting down the port to the second switch to see  if the errors stop?