topic Re: Lease-binding database full, no empty entries found in ICX Switches

Lease-binding database full, no empty entries found

bharat_gole — Wed, 10 Feb 2021 15:43:41 GMT

Hi,

we have facing issue every day as Lease-binding database full in Ruckus ICX 7450 switch.

this is reason so many our client not able to connect with network due to this issue. when i manually enter the command in the switch for flush the entire database- L3_SW_ICX7450#clear ip dhcp-server binding * then they has connected.

we have configured total 20 VLAN.

Conf-

ip dhcp-server pool vlan2
excluded-address 10.2.0.1 10.2.0.50
lease 0 10 0
network 10.2.0.0 255.255.248.0
option 3 ip 10.2.0.1
option 6 ip 8.8.8.8 8.8.4.4
deploy
!

can you please help me how to solve this issue permanently.

Logs- for your reference..

Feb 10 18:41:59:I:DHCPS: verified client requested address 10.10.10.69 in lease binding, updating entry
Feb 10 18:41:59:I:DHCPS: Received APR-PING reply from client 10.10.10.69
Feb 10 18:41:59:I:DHCPS: Failed to allocate new lease entry
Feb 10 18:41:59:I:DHCPS: Lease-binding database full, no empty entries found
Feb 10 18:41:56:I:DHCPS: Lease-binding database full, no empty entries found
Feb 10 18:41:56:I:DHCPS: Received APR-PING reply from client 10.10.10.69
Feb 10 18:41:55:I:DHCPS: Failed to allocate new lease entry
Feb 10 18:41:55:I:DHCPS: Lease-binding database full, no empty entries found
Feb 10 18:41:55:I:DHCPS: Failed to allocate new lease entry
Feb 10 18:41:55:I:DHCPS: Lease-binding database full, no empty entries found
Feb 10 18:41:54:I:DHCPS: Failed to allocate new lease entry
Feb 10 18:41:54:I:DHCPS: Lease-binding database full, no empty entries found
Feb 10 18:41:52:I:DHCPS: Lease-binding database full, no empty entries found
Feb 10 18:41:48:I:DHCPS: sending ACK message to client 10.10.10.97
Feb 10 18:41:48:I:DHCPS: verified client requested address 10.10.10.97 in lease binding, updating entry
Feb 10 18:41:47:I:DHCPS: No ARP-PING reply from client 10.10.10.97
Feb 10 18:41:46:I:DHCPS: Lease-binding database full, no empty entries found
Feb 10 18:41:40:I:DHCPS: sending ACK message to client 10.2.0.96
Feb 10 18:41:38:I:DHCPS: sending ACK message to client 10.2.0.52
Feb 10 18:41:38:I:DHCPS: verified client requested address 10.2.0.52 in lease binding, updating entry
Feb 10 18:41:38:I:DHCPS: No ARP-PING reply from client 10.2.0.52
Feb 10 18:41:38:I:DHCPS: Lease-binding database full, no empty entries found

Re: Lease-binding database full, no empty entries found

BenBeck — Wed, 24 Feb 2021 17:22:17 GMT

Hey There,

How many bindings are present? Please note we support up to 500 DHCP bindings. If you are trying to give out more than 500 addresses, you could see the messages above.

Re: Lease-binding database full, no empty entries found

bharat_gole — Thu, 18 Mar 2021 06:29:44 GMT

hi ben,

Thanks for your valuable response.

we really don't understand, what is exact issue. we had upgraded the firmware ver 08.0.30fT213 to 08.0.90dT213 on 30th Jan 2021, before the upgradation we had not facing such issue.

if ICX switch have support up to 500 DHCP binding, then how its worked before.

Please let us know, how can we manage if we have more than 500 DHCP.

Every morning i have to use this command for clear binding.

ICX7450#clear ip dhcp-server binding *

Re: Lease-binding database full, no empty entries found

bharat_gole — Thu, 18 Mar 2021 08:14:15 GMT

in cisco - The DHCP snooping database can store upto 2000 bindings. why is limits only 500 binding in Ruckus.

Our entire IT infra connected with Ruckus devices only.

i need a solution.

Re: Lease-binding database full, no empty entries found

BenBeck — Thu, 18 Mar 2021 13:56:00 GMT

Hey Bharat,

DHCP bindings and DHCP snooping are different items. The 500 maximum limit has been there for years. It may have been the case that you were just under this number and now you are reaching it. You could try to lower the lease time in an effort to churn more addresses, but if you actively have >500 users on the network at a time, this will not resolve your problem. You would need to add another DHCP server or move the service off the ICX completely. My understanding is that we are increasing this number with FastIron 9.0, but this is subject to change. 9.0 should be releasing in the next couple months.

Re: Lease-binding database full, no empty entries found

bharat_gole — Mon, 22 Mar 2021 12:34:32 GMT

Hi Ben,

thanks for response.

you said ICX Switch have limits up to 500 users if you crossed the limit then this error will coming, right .?

But, today I had a completely different experience.

See - when the error occurred. I have checked the arp entry.

we found - we still get this error, while our 327 client connected only.

Quest_L3_SW_ICX7450#sh log
Syslog logging: enabled ( 0 messages dropped, 0 flushes, 148 overruns)
Buffer logging: level ACDMEINW, 4000 messages logged
level code: A=alert C=critical D=debugging M=emergency E=error
I=informational N=notification W=warning

Static Log Buffer:
Feb 11 07:45:17:I:System: Stack unit 1 Power supply 2 is up

Dynamic Log Buffer (4000 lines):
Mar 22 17:49:21:I:DHCPS: Failed to allocate new lease entry
Mar 22 17:49:21:I:DHCPS: Lease-binding database full, no empty entries found
Mar 22 17:49:21:I:DHCPS: Writing entries to Flash
Mar 22 17:49:17:I:DHCPS: Failed to allocate new lease entry
Mar 22 17:49:17:I:DHCPS: Lease-binding database full, no empty entries found
Mar 22 17:49:17:I:DHCPS: Failed to allocate new lease entry

Quest_L3_SW_ICX7450#sh arp
Total number of ARP entries: 327
Entries in default routing instance:
No. IP Address MAC Address Type Age Port Status
1 10.2.0.212 e803.9a8c.1544 Dynamic 0 1/2/1 Valid
2 10.2.0.214 0045.e235.c81f Dynamic 0 1/2/1 Valid
3 10.2.0.215 b052.16c3.0bc9 Dynamic 0 1/2/1 Valid
4 10.2.0.216 bc54.2f32.1112 Dynamic 0 1/2/1 Valid
5 10.2.0.221 88e9.fe59.2b94 Dynamic 2 1/2/1 Valid
6 10.2.0.223 742b.62f3.ebc9 Dynamic 0 1/1/2 Valid
7 10.2.0.225 046c.59d6.bf23 Dynamic 0 1/2/1 Valid

Re: Lease-binding database full, no empty entries found

BenBeck — Mon, 22 Mar 2021 13:04:54 GMT

Hey Bharat,

Those two numbers (ARP and dhcp bindings) may not match depending on your setup. They are not always a 1-to-1 thing.

Re: Lease-binding database full, no empty entries found

bharat_gole — Thu, 12 Aug 2021 12:13:18 GMT

@ben_beck yes you was right.

now the released the 9.0.00 firmware on the 27th July 2021
and the IP DHCP Binding Scalability have upto 3000 in that firmware.

Thank for your valuable support.