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We migrated from Catalyst 6k5 to 9k platform and found that DHCP snooping works different on the new platform. I cannot find if it is a feature or bug. So far we had DHCP snooping only in access layer, not in core. After migration, the end hosts were...
I found the same behaviour on IOS XE 16.6.4, 16.8.1s and 16.9.1. I tested with Catalyst 9500 and 9300. With IOS 16.6.3 speed auto negotiation works, but when I upgraded one switch the link did not come up until I configured speed nonegotiate.
Befo...
Hi guys,
I struggled several days with upgrade of the DNA appliance from 1.1 to 1.1.2, but in the end I found a working workaround for this bug.
From the CLI I could see the system was failing upgrading:
$ maglev package status
maglev-1 [main -...
Hi,
Anybody knows what is my switch trying to say by "Configuration register = 0x2102 (will be 0x2942 at next reload)"
I googled the meaning of config register 0x2942 but I cannot find any explanation.
Here is the whole CLI output containing th...
Hi,I had the same issue, adding required telemetry subscription solved the issue. Add this to your config:telemetry ietf subscription 10002encoding encode-tdlfilter tdl-uri /services;serviceName=iosevent/syslog_msgstream nativeupdate-policy on-change...
Hi, the sad truth is, that I missed that command Now I check the configuration history I see ip dhcp relay information trust-all on the C6k as well. My bad! Thanks for your tips! M
Configuring "ip dhcp relay information trust-all" on the core switch did the trick. Now DHCP works with snooping enabled on access layer only.RegardsMichal
My issue is that I used to run DHCP snooping on the access layer only, but with 9k in the core I have to enable it on the core switch as well. The question is: Is this a kind of change in the new platform, or is it wrong behaviour?
