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Lab3.3: Step 6 Check for tunnel interfaces
ehj52n
Posts: 12
I am using the following setup:
- OS: Ubuntu 22.04.3 LTS with 4vCPUs and 8GB RAM
- k8s: v1.27.1
- cilium: v1.14.1
I see the following network interfaceson the control plane VM:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52:54:00:9f:9e:3e brd ff:ff:ff:ff:ff:ff inet 192.168.122.85/24 metric 100 brd 192.168.122.255 scope global dynamic enp1s0 valid_lft 2784sec preferred_lft 2784sec inet6 fe80::5054:ff:fe9f:9e3e/64 scope link valid_lft forever preferred_lft forever 3: cilium_net@cilium_host: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 76:84:ba:db:63:11 brd ff:ff:ff:ff:ff:ff inet6 fe80::7484:baff:fedb:6311/64 scope link valid_lft forever preferred_lft forever 4: cilium_host@cilium_net: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 56:e1:59:c7:bf:7a brd ff:ff:ff:ff:ff:ff inet 192.168.0.20/32 scope global cilium_host valid_lft forever preferred_lft forever inet6 fe80::54e1:59ff:fec7:bf7a/64 scope link valid_lft forever preferred_lft forever 5: cilium_vxlan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 link/ether ae:a5:7a:7d:e7:54 brd ff:ff:ff:ff:ff:ff inet6 fe80::aca5:7aff:fe7d:e754/64 scope link valid_lft forever preferred_lft forever 7: lxc_health@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 2a:29:b8:57:ca:ea brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet6 fe80::2829:b8ff:fe57:caea/64 scope link valid_lft forever preferred_lft forever 9: lxc903dbdf31637@if8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether e2:0d:bd:02:3b:d7 brd ff:ff:ff:ff:ff:ff link-netns cni-5cacffd1-f3f2-f707-45ea-2da93f0ef327 inet6 fe80::e00d:bdff:fe02:3bd7/64 scope link valid_lft forever preferred_lft forever 11: lxc61433227e22c@if10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether e6:37:ec:9c:db:46 brd ff:ff:ff:ff:ff:ff link-netns cni-17fe8e6c-3747-5871-62d5-7095926209cc inet6 fe80::e437:ecff:fe9c:db46/64 scope link valid_lft forever preferred_lft forever
Is there no tun0
because cilium's implementation changed, or did I do something wrong?
How can I verify, that my set-up is working correctly?
0
Best Answer
-
Hello,
Calico used tunl0 is an IPIP tunnel for encapsulating pod traffic. We will update the labs to remove the Calico and tunl0 reference from the lab section. We are currently using the Cilium as CNI.
You can use sudo tcpdump -i cilium_host or sudo tcpdump -i cilium_vxlan as well to verify.
From the output I see above, everything looks fine.
thank you
2
Answers
-
In one of the next steps, I used
sudo tcpdump -i cilium_vxlan
and it worked like a charm.Hence, everything is okay. Thank you very much for your response!
0
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