| spatel | jrosser hey! | 18:31 |
|---|---|---|
| jamesdenton_ | spatel you around? | 20:15 |
| spatel | yes | 20:15 |
| spatel | whats up | 20:15 |
| jamesdenton_ | re: my email about EVPN | 20:15 |
| spatel | let me check | 20:15 |
| jamesdenton_ | just from the other day... was observing some PXE issues (DHCP, really) and was curious to know if you're using Ironic | 20:16 |
| spatel | I am not using Ironic | 20:16 |
| jamesdenton_ | k | 20:17 |
| spatel | I have simple PXE server to bootstrap my compute nodes | 20:17 |
| spatel | I am curious why are you having issue with DHCP. Its just standard protocol | 20:17 |
| spatel | Do you have arp-suppression in EVPN ? | 20:17 |
| spatel | Try to disable and see | 20:17 |
| jamesdenton_ | yeah, i agree. Not sure why, but the DHCP Offer seems to be dropped at the spine. ARP supression is disabled | 20:17 |
| spatel | EVPN should treat DHCP packet standard way | 20:18 |
| jamesdenton_ | i would think so, too. Everything else seems to be OK. In fact, I kicked a machine via ISO and tested DHCP successfully | 20:19 |
| spatel | Do you have Cisco or Cumulus ? | 20:19 |
| jamesdenton_ | Cisco 93180YC-FX3 | 20:19 |
| spatel | I have same hardware in my EVPN fabric | 20:19 |
| spatel | I would like to see your config and I can share mine if you want :) | 20:20 |
| jamesdenton_ | I'll see what I can do. Might be next week, as I'm officially PTO this week | 20:20 |
| spatel | Ok sure! no worry | 20:20 |
| jamesdenton_ | what are you using for the underlay? | 20:20 |
| spatel | I have OSFP + BGP | 20:21 |
| spatel | https://community.cisco.com/t5/software-defined-access-sd-access/border-drops-dhcp-discovery-packets/td-p/3858201 | 20:22 |
| spatel | This is what I have pretty much - https://satishdotpatel.github.io/bgp-evpn-vxlan-in-datacenter/ | 20:22 |
| spatel | I am running multicast for BUM traffic handling | 20:23 |
| jamesdenton_ | cool, yeah, i read that a few times :) | 20:24 |
| spatel | I am very curious that why DHCP getting dropped at spine? (spin is nothing but just l3 traffic forwarder) | 20:25 |
| spatel | make sure MTUs are set to jumbo | 20:26 |
| jamesdenton_ | yeah, we see the packet on the leaf-side interface but not the spine-side | 20:27 |
| jamesdenton_ | not sure what's happening there, as nothing relevant is logged and the forwarding tables look OK | 20:28 |
| spatel | may be leaf switch not able to forward to spine. (again its just VxLAN tunnel to A to B leaf) | 20:28 |
| spatel | make sure NXOS version is latest or no bug :) | 20:29 |
| jamesdenton_ | yeah, we're on 10.x i need to verify | 20:29 |
| spatel | I am running nxos 9.10.3 | 20:29 |
| jamesdenton_ | next week i will hit it hard. will let you know. might be worth downgrading to match and see | 20:30 |
| spatel | sure! I will forward you my config of spine and leaf and see if anything you missed | 20:30 |
| spatel | my fabric is all running L2 | 20:32 |
| jamesdenton_ | sure, that would be appreciated. thanks | 20:32 |
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