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[doc] Update docs for dhcp_relay config cli #2598

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[doc] Update docs for dhcp_relay config cli #2598

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[doc] Update docs for dhcp_relay config cli
yaqiangz Jan 16, 2023
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yaqiangz Jan 19, 2023
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68 changes: 68 additions & 0 deletions doc/Command-Reference.md
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Original file line number Diff line number Diff line change
Expand Up @@ -2348,6 +2348,74 @@ This command is used to delete a configured DHCP Relay Destination IP address or
Restarting DHCP relay service...
```

**config dhcp_relay ipv4 helper add/del**

This command is used to add or delete IPv4 DHCP Relay helper addresses to a VLAN. Note that more than one DHCP Relay helper addresses can be operated on a VLAN interface.

- Usage:
```
config dhcp_relay ipv4 helper (add | del) <vlan_id> <dhcp_helper_ips>
```

- Example:
```
admin@sonic:~$ sudo config dhcp_relay ipv4 helper add 1000 7.7.7.7
Added DHCP relay address [7.7.7.7] to Vlan1000
Restarting DHCP relay service...
```

```
admin@sonic:~$ sudo config dhcp_relay ipv4 helper add 1000 7.7.7.7 1.1.1.1
Added DHCP relay address [7.7.7.7, 1.1.1.1] to Vlan1000
Restarting DHCP relay service...
```

```
admin@sonic:~$ sudo config dhcp_relay ipv4 helper del 1000 7.7.7.7
Removed DHCP relay address [7.7.7.7] from Vlan1000
Restarting DHCP relay service...
```

```
admin@sonic:~$ sudo config dhcp_relay ipv4 helper del 1000 7.7.7.7 1.1.1.1
Removed DHCP relay address [7.7.7.7, 1.1.1.1] from Vlan1000
Restarting DHCP relay service...
```

**config dhcp_relay ipv6 destination add/del**

This command is used to add or del IPv6 DHCP Relay destination addresses to a VLAN. Note that more than one DHCP Relay Destination addresses can be operated on a VLAN interface.

- Usage:
```
config dhcp_relay ipv6 destination (add | del) <vlan_id> <dhcp_destination_ips>
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Why destination and not helper?

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According to our discussion, add ipv4 helper and ipv6 destination. ipv4 helper part I added is in line2351-line2382

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Yes, helpers are DHCPv4 only concept, DHCPv6 it use relay destination.

```

- Example:
```
admin@sonic:~$ sudo config dhcp_relay ipv6 destination add 1000 fc02:2000::1
Added DHCP relay address [fc02:2000::1] to Vlan1000
Restarting DHCP relay service...
```

```
admin@sonic:~$ sudo config dhcp_relay ipv6 destination add 1000 fc02:2000::1 fc02:2000::2
Added DHCP relay address [fc02:2000::1, fc02:2000::2] to Vlan1000
Restarting DHCP relay service...
```

```
admin@sonic:~$ sudo config dhcp_relay ipv6 destination del 1000 fc02:2000::1
Removed DHCP relay address [fc02:2000::1] from Vlan1000
Restarting DHCP relay service...
```

```
admin@sonic:~$ sudo config dhcp_relay ipv6 destination del 1000 fc02:2000::1 fc02:2000::2
Removed DHCP relay address [fc02:2000::1, fc02:2000::2] from Vlan1000
Restarting DHCP relay service...
```

Go Back To [Beginning of the document](#) or [Beginning of this section](#dhcp-relay)


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