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20 Messages

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404 Points

Wed, Feb 10, 2021 3:43 PM

Lease-binding database full, no empty entries found

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

Official Solution

Employee

 • 

183 Messages

 • 

3.2K Points

8 m ago

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. 

20 Messages

 • 

404 Points

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 *

20 Messages

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404 Points

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.

Employee

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183 Messages

 • 

3.2K Points

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. 

Ben Beck, RCNA

Principal Technical Support Engineer

Support - 1-855-782-5871
https://support.ruckuswireless.com/contact-us

20 Messages

 • 

404 Points

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 

Employee

 • 

183 Messages

 • 

3.2K Points

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. 

Ben Beck, RCNA

Principal Technical Support Engineer

Support - 1-855-782-5871
https://support.ruckuswireless.com/contact-us

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