# Cisco IOS DHCP Client Identifier

**URL:** https://forum.networklessons.com/t/cisco-ios-dhcp-client-identifier/1284
**Category:** Lessons Discussion
**Created:** [December 29, 2016, 8:06pm UTC](https://forum.networklessons.com/t/cisco-ios-dhcp-client-identifier/1284 "2016-12-29T20:06:05Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![bandumitra](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/b/b5a626/32.png) [@bandumitra](https://forum.networklessons.com/u/bandumitra)
#### Post date: [August 14, 2015, 1:59am UTC](https://forum.networklessons.com/t/cisco-ios-dhcp-client-identifier/1284/2 "2015-08-14T01:59:17Z")

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Hi Rene,  
I tried this on WAN interface because my ISP uses DHCP, but didn’t make any difference to client-id.

```
interface GigabitEthernet0/1
 ip address dhcp client-id GigabitEthernet0/1
 ip access-group INTERNET in
 ip nat outside
 ip inspect FIREWALL out
 ip virtual-reassembly in

Aug 13 23:42:47 UTC: Retry count: 1 Client-ID: cisco-c471.fec5.39d9-Gi0/1
Aug 13 23:42:47 UTC: Client-ID hex dump: 636973636F2D633437312E666563352E
Aug 13 23:42:47 UTC: 333964392D4769302F31
Aug 13 23:42:47 UTC: Hostname: c2901
Aug 13 23:42:47 UTC: DHCP: SRequest - ciaddr: x.x.x.x
Aug 13 23:42:47 UTC: DHCP: SRequest placed class-id option: 636973636F706E70
Aug 13 23:42:47 UTC: DHCP: SRequest: 304 bytes
Aug 13 23:42:47 UTC: DHCP: SRequest: 304 bytes
Aug 13 23:42:47 UTC: DHCP: Received a BOOTREP pkt
Aug 13 23:42:47 UTC: DHCP: Scan: Message type: DHCP Ack
Aug 13 23:42:47 UTC: DHCP: Scan: Client ID: cisco-c471.fec5.39d9-Gi0/1

```

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