diosbejgli at gmail
Apr 2, 2012, 3:45 PM
Post #2 of 2
Re: Is there sticky ARP functionality on Private VLAN in NX-OS
[In reply to]
Sticky ARP is not available yet for Nexus series switches. There's an
internal enhancement request opened for supporting "ip sticky-arp" on
NX-OS but it's not yet implemented.
I've removed the incorrect note from the Cisco DocWiki, however note
that it's not the official Cisco Documentation.
On Thu, Mar 22, 2012 at 2:14 AM, Stoward, Matt
<Matt.Stoward [at] team> wrote:
> Hi all,
> When configuring PVLANs in IOS, the L3 SVIs automatically get sticky ARP turned on and to remove it is quite simple.
> In NX-OS things are a little uncertain. It is implied that the behavior is the same but I don't think it actually is. On the Cisco site in http://docwiki.cisco.com/wiki/Cisco_Nexus_7000_Series_NX-OS_Troubleshooting_Guide_--_Troubleshooting_VLANs , and to quote: "Note: We recommend that you enable sticky Address Resolution Protocol (ARP) when you configure private VLANs. ARP entries learned on Layer 3 private VLAN interfaces, or SVIs, are sticky ARP entries. For security reasons, private VLAN port sticky ARP entries do not age out. "
> This is the only reference I can find to sticky ARP anywhere (except for a couple of similar looking entries for this like the 1000V). Is this quite possibly an error in documentation? Having sticky ARPs in a big virtualized environment is going to break things for the sever guys and I want to ensure I head this off before it becomes a problem.
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