Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

ezy
New Member

Nexus 5548 arp request

I have Nexus 5548UP, Version version 5.0(3)N2(2b), with a flat configured network. Customer has put several IP subnets on one Vlan. In one subnet is an Siemens SPS wich connects to a Server. This SPS is not reachable since I send a ping from the N5k, then everything works fine. Sniffering that port no arp requests from the N5k are captured. That hapens with every device (Siemens SPS) in the network. Every other clients and server are working fine and there are no problems. Any ideas?

1 REPLY
Cisco Employee

Nexus 5548 arp request

Hi Ezy

If you have configured several ip ranges in same SVI interface using "secondary" keyword like:

interface ethx/y

ip addrexx a.a.a.a/z

ip address b.b.b.b/z secondary

ip address c.c.c.c/z secondary

Routing issues between these ranges will occur.

There is a bug: CSCtx11610

So the best would be to create separate vlans for each ip range and not use "secondary" address configuration.

Bug is fixed an fix will be commited to next NX-OS release.

HTH,

Alex

638
Views
0
Helpful
1
Replies