11-05-2021 09:24 AM
I have 3 new stacks of 9300 switches. 2 of the stacks work fine with DHCP Snooping on. 1 Stack does not. When the below commands are on the switch DHCP will not pulled. When i remove them IP's pull. I have reloaded the switch and still doesnt work.
IOS 16.12.4
The following commands are on the switch
ip dhcp snooping vlan 1-4094
no ip dhcp snooping information option
ip dhcp snooping
Two trunk fiber ports back to core
IND-IDF-08#sh run int t1/1/1
Building configuration...
Current configuration : 144 bytes
!
interface TenGigabitEthernet1/1/1
description IND-CORE-9500
switchport mode trunk
channel-group 1 mode active
ip dhcp snooping trust
end
IND-IDF-08#sh run int t2/1/1
Building configuration...
Current configuration : 144 bytes
!
interface TenGigabitEthernet2/1/1
description IND-CORE-9500
switchport mode trunk
channel-group 1 mode active
ip dhcp snooping trust
end
Solved! Go to Solution.
11-05-2021 09:51 AM
- You may give it a try on the problematic stack , with the current advisory release :
https://software.cisco.com/download/home/286313862/type/282046477/release/Amsterdam-17.3.4
M.
11-05-2021 09:36 AM
- Check if you may got hit by this bug :
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvi39202
M.
11-05-2021 09:38 AM
Says the current version i am on is a fixed version. I did inquire with TAC but not reviewing with them until Monday. All 3 stacks have same IOS Code as well right now. Two are working but i am worried it will be a matter of time before they stop now.
11-05-2021 09:39 AM
what is the other switches running Code - must be differrent than this, since this has bug i have encountered.
Try 17.X
11-05-2021 09:46 AM
Same versions on all 3 switch stacks 16.12.4
11-05-2021 09:51 AM
- You may give it a try on the problematic stack , with the current advisory release :
https://software.cisco.com/download/home/286313862/type/282046477/release/Amsterdam-17.3.4
M.
11-05-2021 11:10 AM
Upgrading code with Cisco TAC resolved the issue. There not sure which bug i was hitting but I was definitely hitting something regarding DHCP Snooping. Thanks everyone
11-05-2021 10:18 AM
Can you post show run inter port-chan X (from working and not working )
11-05-2021 10:10 AM
Hello,
just to be sure: did you configure 'ip dhcp snooping trust' on the port channel interfaces as well ?
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