Damien/arista-evpn-vxlan-clab
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Force fabric default route on campus hosts

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The 'ip route add default via <fabric-gw>' exec command silently failed
on campus-host1 and campus-host2 because the management DHCP on eth0
had already installed a default via 172.16.0.254. As a result, traffic
leaving the host for other fabric subnets was sent out the management
interface instead of the EVPN fabric, breaking end-to-end ping.

Switch to 'ip route replace' so the fabric gateway overrides whatever
default is installed at container start.
This commit is contained in:
Damien Arnodo
2026-04-23 16:14:43 +00:00
parent cb74dd118f
commit 97fbc1cebe
1 changed files with 2 additions and 2 deletions
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4
evpn-lab.clab.yml
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@@ -279,7 +279,7 @@ topology:
exec: exec:
- ip link set dev eth1 up - ip link set dev eth1 up
- ip addr add 10.60.60.101/24 dev eth1 - ip addr add 10.60.60.101/24 dev eth1
- ip route add default via 10.60.60.1 - ip route replace default via 10.60.60.1
campus-host2: campus-host2:
kind: linux kind: linux
@@ -292,7 +292,7 @@ topology:
exec: exec:
- ip link set dev eth1 up - ip link set dev eth1 up
- ip addr add 10.60.70.102/24 dev eth1 - ip addr add 10.60.70.102/24 dev eth1
- ip route add default via 10.60.70.1 - ip route replace default via 10.60.70.1
links: links:
# ===================================================== # =====================================================