The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
ACI Virtual Edge (AVE) provides IPv4 Intrusion Detection System (IDS) packet checks to increase security in the network by dropping packets that match specific criteria that are typically not required in most production networks. IDS packet checks are enabled by default and should be left enabled unless there is a specific reason to disable them.
This section describes the guidelines and limitations for IDS:
IDS can be disabled by logging into to AVE and run the vemcmd set ids disable command.
 Note |
This is not persistent upon AVE reboot. |
There is no knob in the APIC GUI to turn this feature on or off.
The following packet validations are done by IDS:
consistency checks between frame length, IHL, Total length (no strict)
- IHL >= 5
- payload length + 8*frag_offset <= 64K
- If DF==1 then must have frag_offset == 0
- Invalid packet padding
- disallow SA == 255.255.255.255
- disallow SA == 127.x.x.x
- disallow DA == 127.x.x.x
- disallow IPSA = IPDA
- disallow DA = 0.0.0.0
- disallow SA of class D
- disallow SA of class E
- disallow DA of class E
Feedback