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ASR 1002 and udp broadcast

Jean-Marc Tetu
Level 1
Level 1

Hello,

Since a upgrade in IOS XE 3.0.9, our ASR 1002 have a problem with the DHCPDISCOVER.

When  i do some debug

asr1002#debug ip udp port 67
UDP packet debugging is on
asr1002#debug ip udp port 68
UDP packet debugging is on

And i do some tests with an linux utility like "socat", we obtain:

May 17 15:51:33.239 METDST: UDP: rcvd src=192.168.7.78(34747), dst=192.168.7.1(68), length=14

May 17 15:51:41.837 METDST: UDP: rcvd src=192.168.7.78(40462), dst=192.168.7.255(68), length=14

with the destination adress 192.168.7.255

But with  255.255.255.255, nothing !

The configuration of interface:

interface GigabitEthernet0/0/0.674
description Vlan Pavillons
encapsulation dot1Q 674
ip address 192.xxx.xxx.xxx 255.255.255.248 secondary
ip address 192.168.7.1 255.255.255.0
ip helper-address 10.xx.xx.xx
ip helper-address 10.yy.yy.yy
ip information-reply
ip nat inside
ip pim sparse-mode
ip virtual-reassembly
zone-member security FAI
ip policy route-map BANLIEU
end

Somebody have an idea ? Thanks for help

PS:

a "show ip dhcp server statistics" sho that the dhcpdiscover are not seen !!!!

Message              Received
BOOTREQUEST          0
DHCPDISCOVER         4
DHCPREQUEST          4890
DHCPDECLINE          0
DHCPRELEASE          2
DHCPINFORM           1
DHCPVENDOR           0
BOOTREPLY            0
DHCPOFFER            0
DHCPACK              9670
DHCPNAK              0

Message              Sent
BOOTREPLY            0
DHCPOFFER            0
DHCPACK              0
DHCPNAK              0

Message              Forwarded
BOOTREQUEST          0
DHCPDISCOVER         0
DHCPREQUEST          9780
DHCPDECLINE          0
DHCPRELEASE          4
DHCPINFORM           2
DHCPVENDOR           0
BOOTREPLY            0
DHCPOFFER            0
DHCPACK              9670
DHCPNAK              0

3 Replies 3

Jean-Marc Tetu
Level 1
Level 1

we have downgrade the ASR. It's working again...

And an ugrade 15.3(3)S  works fine !!!!

The complete reference of IOS:

Cisco IOS XE Software, Version 03.10.00.S - Extended Support Release
Cisco IOS Software, ASR1000 Software (PPC_LINUX_IOSD-ADVIPSERVICESK9-M), Version 15.3(3)S, RELEASE SOFTWARE (fc1)

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