Default Network#
In this exercise we create the default network. The default network is your underlay network configuration, the network that interconnects all the devices. Looking at the configuration it looks really slim. The reason is that this leverages the parameters setup in the previous step network config.
Default Network
Execute the following command to instantiate the default network
Configure the default underlay network
=====================================
# apply the default network config [1/1]:
> kubectl apply -f https://raw.githubusercontent.com/kubenet-dev/kubenet/v0.0.1/network/default-network.yaml
network.network.app.kuid.dev/topo3nodesrl.default created
While this looks really simple, a lot is happening under the hood. This default network is leveraging the network config setup in the previous step and allocates AS per device for the underlay, It allocate a IP prefix for each link in the network per address family and a IP address for its individual endpoints, etc. On top a device config is derived through an abstract data model, which is mapped to srlinux for the specific implementation of the device. Once the device configuration is available for all the devices, the configurations are transacted to the device using sdc.
!!!note "In a later exercise (gitops) you will see that another option is to check in the resulting device configurations in git, rather than transacting to the network".
Let's go through some resources that got allocated through these steps.
First an AS number per device is allocated, through the ASClaim API.
NAME READY INDEX CLAIMTYPE CLAIMREQ CLAIMRSP
topo3nodesrl.default.aspool True topo3nodesrl.default range 65000-65100 65000-65100
topo3nodesrl.default.core01 True topo3nodesrl.default dynamicID 65002
topo3nodesrl.default.edge01 True topo3nodesrl.default dynamicID 65001
topo3nodesrl.default.edge02 True topo3nodesrl.default dynamicID 65000
topo3nodesrl.default.ibgp True topo3nodesrl.default staticID 65535 65535
A Set of IP claims are created for the respective loopbacks and inter-subnet links using the IPClaim API.
NAME READY INDEX CLAIMTYPE PREFIXTYPE CLAIMREQ CLAIMRSP DEFAULTGATEWAY
topo3nodesrl.default.10.0.0.0-16 True topo3nodesrl.default staticPrefix pool 10.0.0.0/16 10.0.0.0/16
topo3nodesrl.default.1000---64 True topo3nodesrl.default staticPrefix pool 1000::/64 1000::/64
topo3nodesrl.default.1192---56 True topo3nodesrl.default staticPrefix network 1192::/56 1192::/56
topo3nodesrl.default.192.0.0.0-16 True topo3nodesrl.default staticPrefix network 192.0.0.0/16 192.0.0.0/16
topo3nodesrl.default.core01.e1-1.ipv4 True topo3nodesrl.default dynamicAddress network 192.0.255.253/31
topo3nodesrl.default.core01.e1-1.ipv6 True topo3nodesrl.default dynamicAddress network 1192::2/127
topo3nodesrl.default.core01.e1-2.ipv4 True topo3nodesrl.default dynamicAddress network 192.0.0.3/31
topo3nodesrl.default.core01.e1-2.ipv6 True topo3nodesrl.default dynamicAddress network 1192::ff:ffff:ffff:ffff:fffd/127
topo3nodesrl.default.core01.ipv4 True topo3nodesrl.default dynamicAddress pool 10.0.0.0/32
topo3nodesrl.default.core01.ipv6 True topo3nodesrl.default dynamicAddress pool 1000::2/128
topo3nodesrl.default.edge01.e1-49.core01.e1-1.ipv4 True topo3nodesrl.default dynamicPrefix network 192.0.255.252/31
topo3nodesrl.default.edge01.e1-49.core01.e1-1.ipv6 True topo3nodesrl.default dynamicPrefix network 1192::2/127
topo3nodesrl.default.edge01.e1-49.ipv4 True topo3nodesrl.default dynamicAddress network 192.0.255.252/31
topo3nodesrl.default.edge01.e1-49.ipv6 True topo3nodesrl.default dynamicAddress network 1192::3/127
topo3nodesrl.default.edge01.ipv4 True topo3nodesrl.default dynamicAddress pool 10.0.0.1/32
topo3nodesrl.default.edge01.ipv6 True topo3nodesrl.default dynamicAddress pool 1000::1/128
topo3nodesrl.default.edge02.e1-49.core01.e1-2.ipv4 True topo3nodesrl.default dynamicPrefix network 192.0.0.2/31
topo3nodesrl.default.edge02.e1-49.core01.e1-2.ipv6 True topo3nodesrl.default dynamicPrefix network 1192::ff:ffff:ffff:ffff:fffc/127
topo3nodesrl.default.edge02.e1-49.ipv4 True topo3nodesrl.default dynamicAddress network 192.0.0.2/31
topo3nodesrl.default.edge02.e1-49.ipv6 True topo3nodesrl.default dynamicAddress network 1192::ff:ffff:ffff:ffff:fffc/127
topo3nodesrl.default.edge02.ipv4 True topo3nodesrl.default dynamicAddress pool 10.0.0.2/32
topo3nodesrl.default.edge02.ipv6 True topo3nodesrl.default dynamicAddress pool 1000::/128
The abstracted device models per device can be viewed with this command
NAME READY PROVIDER
topo3nodesrl.default.core01 True srlinux.nokia.com
topo3nodesrl.default.edge01 True srlinux.nokia.com
topo3nodesrl.default.edge02 True srlinux.nokia.com
through the -o yaml option in kubectl you get the detailed view of the config in yaml format; -o json provides the json based output
example command for the abstracted config of the edge01 device
The final device specific srlinux configuration sent to the device can be seen through this command.
NAME READY REASON TARGET SCHEMA
topo3nodesrl.default.core01 True ready default/core01 srl.nokia.sdcio.dev/24.3.2
topo3nodesrl.default.edge01 True ready default/edge01 srl.nokia.sdcio.dev/24.3.2
topo3nodesrl.default.edge02 True ready default/edge02 srl.nokia.sdcio.dev/24.3.2
through the -o yaml option in kubectl you get the detailed view of the config in yaml format; -o json provides the json based output
example command for the detailed srlinux config of the edge01 device
Let's check if this finally ended up on the devices
Expected output
+------------------------------+----------------+----------------+----------------+------------------------------+--------------------------------------+
| Name | Type | Admin state | Oper state | Router id | Description |
+==============================+================+================+================+==============================+======================================+
| default | default | enable | up | | k8s-default |
| mgmt | ip-vrf | enable | up | | Management network instance |
+------------------------------+----------------+----------------+----------------+------------------------------+--------------------------------------+
Expected output
----------------------------------------------------------------------------------------------------------------------------------------------------------
BGP neighbor summary for network-instance "default"
Flags: S static, D dynamic, L discovered by LLDP, B BFD enabled, - disabled, * slow
----------------------------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------------
+-----------------+-------------------------+-----------------+------+---------+--------------+--------------+------------+-------------------------+
| Net-Inst | Peer | Group | Flag | Peer-AS | State | Uptime | AFI/SAFI | [Rx/Active/Tx] |
| | | | s | | | | | |
+=================+=========================+=================+======+=========+==============+==============+============+=========================+
| default | 10.0.0.0 | overlay | S | 65535 | established | 0d:0h:8m:2s | evpn | [0/0/0] |
| | | | | | | | ipv4- | [2/0/2] |
| | | | | | | | unicast | [2/0/2] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
| default | 192.0.255.253 | underlay | S | 65002 | established | 0d:0h:8m:32s | ipv4- | [2/2/1] |
| | | | | | | | unicast | [2/2/1] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
| default | 1192::2 | underlay | S | 65002 | established | 0d:0h:8m:37s | ipv4- | [3/1/3] |
| | | | | | | | unicast | [3/2/3] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
+-----------------+-------------------------+-----------------+------+---------+--------------+--------------+------------+-------------------------+
----------------------------------------------------------------------------------------------------------------------------------------------------------
Summary:
3 configured neighbors, 3 configured sessions are established,0 disabled peers
0 dynamic peers
Expected output
+------------------------------+----------------+----------------+----------------+------------------------------+--------------------------------------+
| Name | Type | Admin state | Oper state | Router id | Description |
+==============================+================+================+================+==============================+======================================+
| default | default | enable | up | | k8s-default |
| mgmt | ip-vrf | enable | up | | Management network instance |
+------------------------------+----------------+----------------+----------------+------------------------------+--------------------------------------+
Expected output
----------------------------------------------------------------------------------------------------------------------------------------------------------
BGP neighbor summary for network-instance "default"
Flags: S static, D dynamic, L discovered by LLDP, B BFD enabled, - disabled, * slow
----------------------------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------------
+-----------------+-------------------------+-----------------+------+---------+--------------+--------------+------------+-------------------------+
| Net-Inst | Peer | Group | Flag | Peer-AS | State | Uptime | AFI/SAFI | [Rx/Active/Tx] |
| | | | s | | | | | |
+=================+=========================+=================+======+=========+==============+==============+============+=========================+
| default | 10.0.0.1 | overlay | S | 65535 | established | 0d:0h:9m:54s | evpn | [0/0/0] |
| | | | | | | | ipv4- | [2/0/2] |
| | | | | | | | unicast | [2/0/2] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
| default | 10.0.0.2 | overlay | S | 65535 | established | 0d:0h:9m:56s | evpn | [0/0/0] |
| | | | | | | | ipv4- | [2/0/2] |
| | | | | | | | unicast | [2/0/2] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
| default | 192.0.0.2 | underlay | S | 65000 | established | 0d:0h:10m:26 | ipv4- | [1/1/2] |
| | | | | | | s | unicast | [1/1/2] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
| default | 192.0.255.252 | underlay | S | 65001 | established | 0d:0h:10m:23 | ipv4- | [1/1/2] |
| | | | | | | s | unicast | [1/1/2] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
| default | 1192::3 | underlay | S | 65001 | established | 0d:0h:10m:28 | ipv4- | [3/0/3] |
| | | | | | | s | unicast | [3/1/3] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
| default | 1192::ff:ffff:ffff:ffff | underlay | S | 65000 | established | 0d:0h:10m:31 | ipv4- | [3/0/3] |
| | :fffc | | | | | s | unicast | [3/1/3] |
| | | | | | | | ipv6- | |
| | | | | | | | unicast | |
+-----------------+-------------------------+-----------------+------+---------+--------------+--------------+------------+-------------------------+
----------------------------------------------------------------------------------------------------------------------------------------------------------
Summary:
6 configured neighbors, 6 configured sessions are established,0 disabled peers
0 dynamic peers
You can also see the resulting configuration using kubectl using the following command.
kubectl get runningconfigs.config.sdcio.dev core01 -o yaml
kubectl get runningconfigs.config.sdcio.dev edge01 -o yaml
kubectl get runningconfigs.config.sdcio.dev edge02 -o yaml
Let's see how we can do the same for overlays