cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

595
Views
0
Helpful
4
Replies
Oleg Bukhalov
Beginner

Catalyst 9300, EVPN, L2VNI, IP connectivity issue between SVI of Edges

Hello experts,
I have a simple topology below.

Edge1---Core---Edge2
    |                           |
    |                           |
 PC1                      PC2

Edges HW: C9300-24T
Edges SW: 17.03.04
PC1 and PC2 are in vlan 998. Vlan 998 is stretched between Edges using VXLAN. Edge1 and Edge2 have SVI 998 configured.
From Edge1(SVI998) I can ping PC1 and PC2.
From Edge2(SVI998) I can ping PC1 and PC2.

The question is, Why can't I ping Edge2(SVI998) from Edge1(SVI998) and vice versa. In ARP table I see "Incomplete" records. HSRP and OSPF between SVI998 of Edges don't work either.
I couldn't find if it is expected behavior or not.

If in this topology, Сat9300 is replaced with Nexus9300, then this problem is not observed.

Network topology and Edge's configurations you can find in the attachment.

4 REPLIES 4
Pedroxh
Beginner

Hi

 

The EVPN is up? BGP session between edges is work?

 

In edges, i dont see surpress-arp in NVE interfaces and none RT/RD in VNI config. 

 

See this example

 

https://networkdirection.net/articles/routingandswitching/vxlanoverview/vxlanevpnconfiguration/

 

 

Hi Pedroxh,

EVPN is UP.

Edge11#show bgp l2vpn evpn summary
BGP router identifier 172.25.127.7, local AS number 65001
BGP table version is 12377, main routing table version 12377
51 network entries using 19584 bytes of memory
57 path entries using 12768 bytes of memory
30/27 BGP path/bestpath attribute entries using 8640 bytes of memory
1 BGP AS-PATH entries using 40 bytes of memory
10 BGP extended community entries using 384 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 41416 total bytes of memory
BGP activity 626/563 prefixes, 6632/6555 paths, scan interval 60 secs
53 networks peaked at 16:18:43 Dec 28 2021 Kiev (01:32:28.687 ago)

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
172.25.191.7 4 65001 431340 428526 12377 0 0 5d01h 19

 

Edge1#show l2vpn evpn peers vxlan vni 10998

Interface VNI Peer-IP Num routes eVNI UP time
--------- -------- ------------------------ ---------- -------- --------
nve1 10998 172.25.191.7 6 10998 4d07h

 

I have tried to switch off ARP flooding suppression, it didn't help.

!

l2vpn evpn
flooding-suppression address-resolution disable

!

 

Your example is for NX-OS. I have IOS-XE on Cat9300. As I already mentioned in my first message, with nexus 9300 devices everything is fine. 

Pedroxh
Beginner

Sorry I had understood that the Nexus didn't work either.

 

Did you check this link of the EVPN configuration in catalyst? I see that there are differences from the example of the link compared to its settings.

 

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-12/configuration_guide/vxlan/b_1612_bgp_evpn_vxlan_9300_cg/configuring_evpn_vxlan_layer_2_overlay_network.