DHCP its not receiving on desired port

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xbytemx
Member
Posts: 2
Joined: 14 Mar 2013 14:40

DHCP its not receiving on desired port

Post by xbytemx » 10 Mar 2014 18:34

Hi all, I have some trouble with DHCP that's not receiving on a VLAN ports. First I will share the config

!Config
vlan 4 enable name "VLAN4"
vlan 4 port default 1/37
vlan 4 port default 1/38
vlan 4 port default 2/37
vlan 4 port default 2/38
ip interface "vlan4_radio1" address 192.168.4.254 mask 255.255.255.0 vlan 4 ifindex 3
ip helper address 192.168.4.4 vlan 4

I had on port 1/37 cable that come from antenna with have on the other side a DHCP server, which if i connect directly to a machine It gets DHCP. But if I connect this cable as I said earlier to port 1/37 and a machine to 1/38 it doesn't get IP. Capturing traffic with wireshark reveals that DHCP discover its done in both cases, also other members are sending DHCP discover(from the other side of antenna) I just not get the offer from server, and I don't have any clue.

Also if I check on logs there's nothing more that logins and logouts.

And if I ping DHCP server from switch it respond. If I set manually the IP also get response from switch and DHCP server


If you can help me with some advice it would be greatful!

Kind Regards,

silvio
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Joined: 01 Jul 2008 10:51
Location: Germany

Re: DHCP its not receiving on desired port

Post by silvio » 11 Mar 2014 02:52

if I understand you correctly you have at port 1/37 + 38 a dhcp-server + a dhcp-client.
both ports are in the same vlan . so you don't need ip-helper.

are there any ip-helper vioalations?
> show ip-helper stats

are there any qos-config/policies?
> show configuration snapshot qos

what is the software release?
> show microcode
look in release note from an actual release. Maybe you have a known issue.

regards
Silvio

xbytemx
Member
Posts: 2
Joined: 14 Mar 2013 14:40

Re: DHCP its not receiving on desired port

Post by xbytemx » 14 Mar 2014 15:06

Hello, sorry for the delay in answering.

Here's the output:

> show ip helper stats

Global Statistics :
Reception From Client :
Total Count = 647023, Delta = 647023,
Forw Delay Violation :
Total Count = 350459, Delta = 350459,
Max Hops Violation :
Total Count = 0, Delta = 0,
Agent Info Violation :
Total Count = 0, Delta = 0,
Invalid Gateway IP :
Total Count = 0, Delta = 0,
Invalid Agent Info From Server :
Total Count = 0, Delta = 0,
Server Specific Statistics :
Server 192.168.1.223
Tx Server :
Total Count = 136924, Delta = 136924
Server 192.168.5.4
Tx Server :
Total Count = 0, Delta = 0

------------------------------------------------------------------------------------

-> show configuration snapshot qos
! QOS :
qos log console
policy network group LAN 192.168.0.0 mask 255.255.0.0
policy network group LAN_Administrativos 192.168.20.0 mask 255.255.255.0
policy network group LAN_Informatica 192.168.10.0 mask 255.255.255.0
policy network group LAN_RemotosMID 192.168.4.0 mask 255.255.255.0 192.168.5.0 mask 255.255.255.0
policy network group LAN_RemotosVPN 192.168.2.0 mask 255.255.255.0 192.168.3.0 mask 255.255.255.0 192.168.6.0 mask 255.255.255.0 192.168.7.0 mask 255.255.255.0
policy network group LAN_TelefonosWireless 192.168.30.0 mask 255.255.255.0
policy port group PuertosPBX 1/29-30 2/29-30
policy condition LAN_Administrativos_salida source network group LAN_Administrativos destination ip Any
policy condition LAN_RemotosMID_salida source network group LAN_RemotosMID destination ip Any
policy condition LAN_all source network group LAN destination network group LAN
policy condition TraficoPBX destination port group PuertosPBX
policy condition TraficoVoz source vlan 30
policy condition origen_RDP_1.12_3389 source ip 192.168.1.12 source tcp port 3389
policy condition origen_RDP_1.17_3389 source ip 192.168.1.17 source tcp port 3389
policy condition origen_RDP_1.8_3389 source ip 192.168.1.8 source tcp port 3389
policy condition origen_SAP2_0.31_8100 source ip 192.168.0.31 source tcp port 8100
policy condition origen_SAP2_0.31_8101 source ip 192.168.0.31 source tcp port 8101
policy condition origen_SAP2_0.31_8102 source ip 192.168.0.31 source tcp port 8102
policy condition origen_SAP2_0.31_8103 source ip 192.168.0.31 source tcp port 8103
policy condition origen_SAP2_0.31_ping_echo source ip 192.168.0.31 icmptype 8
policy condition origen_SAP2_0.31_ping_reply source ip 192.168.0.31 icmptype 0
policy condition origen_SAP_0.30_23 source ip 192.168.0.30 source tcp port 23
policy condition origen_SAP_0.30_3299 source ip 192.168.0.30 source tcp port 3299
policy condition origen_SAP_0.30_3602 source ip 192.168.0.30 source tcp port 3602
policy condition origen_SAP_0.30_ping_echo source ip 192.168.0.30 icmptype 8
policy condition origen_SAP_0.30_ping_reply source ip 192.168.0.30 icmptype 0
policy action Allow
policy action MaxPrioridad 802.1p 7
policy action to1905 permanent gateway ip 192.168.252.254
policy action toFW2 permanent gateway ip 192.168.251.252
policy rule LAN precedence 1500 condition LAN_all action Allow
policy rule origen_SAP2_0.31_ping_echo precedence 853 condition origen_SAP2_0.31_ping_echo action to1905
policy rule origen_SAP2_0.31_ping_reply precedence 852 condition origen_SAP2_0.31_ping_reply action to1905
policy rule origen_SAP_0.30_ping_echo precedence 851 condition origen_SAP_0.30_ping_echo action to1905
policy rule origen_SAP_0.30_ping_reply precedence 850 condition origen_SAP_0.30_ping_reply action to1905
policy rule origen_RDP_1.12_3389 precedence 811 condition origen_RDP_1.12_3389 action to1905
policy rule origen_RDP_1.8_3389 precedence 810 condition origen_RDP_1.8_3389 action to1905
policy rule origen_SAP2_0.31_8103 precedence 808 condition origen_SAP2_0.31_8103 action to1905
policy rule origen_SAP2_0.31_8102 precedence 807 condition origen_SAP2_0.31_8102 action to1905
policy rule origen_SAP2_0.31_8101 precedence 806 condition origen_SAP2_0.31_8101 action to1905
policy rule origen_SAP2_0.31_8100 precedence 805 condition origen_SAP2_0.31_8100 action to1905
policy rule origen_SAP_0.30_23 precedence 804 condition origen_SAP_0.30_23 action to1905
policy rule origen_SAP_0.30_3299 precedence 803 condition origen_SAP_0.30_3299 action to1905
policy rule origen_SAP_0.30_3602 precedence 802 condition origen_SAP_0.30_3602 action to1905
policy rule origen_RDP_1.17_3389 precedence 800 condition origen_RDP_1.17_3389 action to1905
policy rule LAN_RemotosMID_toFW2 precedence 501 condition LAN_RemotosMID_salida action toFW2
policy rule LAN_Administrativos_toFW2 precedence 500 condition LAN_Administrativos_salida action toFW2
policy rule ReglaPrioridadPBX condition TraficoPBX action MaxPrioridad
qos apply

-------------------------------------------------------------------------------------------------------------

-> show microcode
Package Release Size Description
-----------------+---------------+--------+-----------------------------------
Kbase.img 6.4.5.402.R02 20599723 Alcatel-Lucent Base Software
Kadvrout.img 6.4.5.402.R02 2991820 Alcatel-Lucent Advanced Routing
K2os.img 6.4.5.402.R02 1965391 Alcatel-Lucent OS
Keni.img 6.4.5.402.R02 6093065 Alcatel-Lucent NI software
Ksecu.img 6.4.5.402.R02 649040 Alcatel-Lucent Security Management
Kencrypt.img 6.4.5.402.R02 3437 Alcatel-Lucent Encryption Management

Thank you for any help you can provide in this situation !
Kind Regards,

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