About nathanharper

nathanharper · 11-10-2018

Background: In our production environment we have a C9500-40X acting as a layer 3 switch with many VLANs and layer 2 switches connected. The layer 2 switches range from 3560 at the low end all the way up to 9300 mgig switches. We have 3750 and 3850...

nathanharper · 12-03-2018

It's not so much that proxy-arp is on, in fact it is on in both cases.Newer IOS doesn't take advantage of proxy-arp (as a layer 3 client), butolder does- from what I discern.

nathanharper · 12-03-2018

Not a native vlan mismatch. See other links I posted in original post.

nathanharper · 11-10-2018

Yes, no ip proxy-arp would stop the L2 switch from receiving the L3 switch MAC address and then a ping would fail. However, that would not stop the L2 switch from sending arp requests for ip addresses outside of its management subnet. To stop the L...

nathanharper · 11-10-2018

It is possible with the right equipment and subnet mask. See my blog: https://community.cisco.com/t5/network-architecture-blogs/reaching-another-network-without-default-gateway-or-route/ba-p/3743447

nathanharper · 11-09-2018

It's not there by default. I confirmed on several switches by returningthem effectively to out-of-box default factory configuration.I'm not confused by difference between ip routing and ip host-routing.With default config, neither "ip host-routing" ...

Member Since	‎03-27-2018 03:38 PM
Date Last Visited	‎01-10-2020 12:13 AM
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Reaching another network without default gateway or route statement.

Re: Reaching another network without default gateway or route statement.

Re: Reaching another network without default gateway or route statement.

Re: Reaching another network without default gateway or route statement.

Re: ping without gateway

Re: can not delete "ip host-routing" command from Switchconfig