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DHCP discovery failure after 802.1x authentication

HAT
Beginner
Beginner

Hi All

I m currently working on a solution to integrate an IP Phone ( SIP100) into the SDA network . I have successfully managed to authenticate and authorize  the device via 802.1x through ISE but failing to obtain an IP address from the DHCP Server .

I have verified that all the DHCP options within the relevant scope are correct but looking like the request is not even getting there .

This is a wired setup using a Cisco 9300 switches and I can confirm that the foundational network setup is correct as I have managed to successfully configure another  phone model  ( Ipecs) as well as some laptops and Desktop Clients   .

As per the below packet capture output  the authentication seems to be working fine but it appears as though the DHCP  process is failing .

Can somebody please assist ?

Thanks in advance 

 

31 62.553820 6c:13:d5:95:17:01 -> 00:26:fd:f0:e4:63 EAP 60 Request, MD5-Challenge EAP (EAP-MD5-CHALLENGE)
32 62.554692 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:03 EAP 60 Response, MD5-Challenge EAP (EAP-MD5-CHALLENGE)
33 62.581952 6c:13:d5:95:17:01 -> 00:26:fd:f0:e4:63 EAP 60 Success
34 62.586189 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
35 62.586236 6c:13:d5:95:17:01 -> 01:80:c2:00:00:00 STP 60 RST. Root = 32768/1/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
36 62.586280 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
--More--   37 63.579096 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
38 63.803498 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
39 63.803552 6c:13:d5:95:17:01 -> 01:80:c2:00:00:00 STP 60 RST. Root = 32768/1/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
40 64.698235 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:0e LLDP 283 TTL = 0 SysName = SIP100-0026fdf0e463 SysDesc = ININ-SIPStation/2.2.8.61.2.1 (ISS100-Rev0; 0026FDF0E463)
41 64.701422 00:26:fd:f0:e4:63 -> 01:00:0c:cc:cc:cc CDP 154 Device ID: 0026fdf0e463 Port ID: esw0
42 64.701472 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:0e LLDP 283 TTL = 120 SysName = SIP100-0026fdf0e463 SysDesc = ININ-SIPStation/2.2.8.61.2.1 (ISS100-Rev0; 0026FDF0E463)
43 65.206966 00:26:fd:f0:e4:63 -> 01:00:0c:cc:cc:cc CDP 154 Device ID: 0026fdf0e463 Port ID: esw0
44 65.579248 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
45 65.711353 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cc CDP 509 Device ID: END-OB-3-UA-EDGE-01.next-uk.next.loc Port ID: GigabitEthernet1/0/1
46 65.714768 6c:13:d5:95:17:01 -> 01:80:c2:00:00:0e LLDP 534 TTL = 120 SysName = END-OB-3-UA-EDGE-01.next-uk.next.loc SysDesc = Cisco IOS Software [Bengaluru], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.6.2, RELEASE SOFTWARE (fc7)\nTechnical Support: http://www.cisco.com/techsupport\nCopyright (c) 1986-2021 by Cisco Systems, Inc.\nCompiled Tue 23-Nov-21 12:41 by mcpre
--More--   47 65.720209 6c:13:d5:95:17:01 -> 6c:13:d5:95:17:01 LOOP 60 Reply
48 66.214228 00:26:fd:f0:e4:63 -> 01:00:0c:cc:cc:cc CDP 154 Device ID: 0026fdf0e463 Port ID: esw0
49 66.715053 6c:13:d5:95:17:01 -> 01:80:c2:00:00:0e LLDP 534 TTL = 120 SysName = END-OB-3-UA-EDGE-01.next-uk.next.loc SysDesc = Cisco IOS Software [Bengaluru], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.6.2, RELEASE SOFTWARE (fc7)\nTechnical Support: http://www.cisco.com/techsupport\nCopyright (c) 1986-2021 by Cisco Systems, Inc.\nCompiled Tue 23-Nov-21 12:41 by mcpre
50 67.214968 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cc CDP 509 Device ID: END-OB-3-UA-EDGE-01.next-uk.next.loc Port ID: GigabitEthernet1/0/1
51 67.224276 00:26:fd:f0:e4:63 -> 01:00:0c:cc:cc:cc CDP 154 Device ID: 0026fdf0e463 Port ID: esw0
52 67.225276 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:0e LLDP 283 TTL = 120 SysName = SIP100-0026fdf0e463 SysDesc = ININ-SIPStation/2.2.8.61.2.1 (ISS100-Rev0; 0026FDF0E463)
53 67.578863 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
54 67.715408 6c:13:d5:95:17:01 -> 01:80:c2:00:00:0e LLDP 534 TTL = 120 SysName = END-OB-3-UA-EDGE-01.next-uk.next.loc SysDesc = Cisco IOS Software [Bengaluru], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.6.2, RELEASE SOFTWARE (fc7)\nTechnical Support: http://www.cisco.com/techsupport\nCopyright (c) 1986-2021 by Cisco Systems, Inc.\nCompiled Tue 23-Nov-21 12:41 by mcpre
55 68.226001 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cc CDP 509 Device ID: END-OB-3-UA-EDGE-01.next-uk.next.loc Port ID: GigabitEthernet1/0/1
--More--   56 68.233056 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:0e LLDP 283 TTL = 120 SysName = SIP100-0026fdf0e463 SysDesc = ININ-SIPStation/2.2.8.61.2.1 (ISS100-Rev0; 0026FDF0E463)
57 69.243320 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:0e LLDP 283 TTL = 120 SysName = SIP100-0026fdf0e463 SysDesc = ININ-SIPStation/2.2.8.61.2.1 (ISS100-Rev0; 0026FDF0E463)
58 69.579462 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
59 70.252955 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:0e LLDP 283 TTL = 120 SysName = SIP100-0026fdf0e463 SysDesc = ININ-SIPStation/2.2.8.61.2.1 (ISS100-Rev0; 0026FDF0E463)
60 71.552667 0.0.0.0 -> 255.255.255.255 DHCP 594 DHCP Discover - Transaction ID 0x20b8092c[Malformed Packet]
61 71.578978 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
62 73.579556 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
63 74.612523 0.0.0.0 -> 255.255.255.255 DHCP 594 DHCP Discover - Transaction ID 0x20b8092c[Malformed Packet]
64 75.580247 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
65 75.720846 6c:13:d5:95:17:01 -> 6c:13:d5:95:17:01 LOOP 60 Reply
66 77.580210 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
--More--   67 77.673075 0.0.0.0 -> 255.255.255.255 DHCP 594 DHCP Discover - Transaction ID 0x20b8092c[Malformed Packet]
68 79.580760 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
69 81.581576 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
70 83.581106 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
71 84.935588 6c:13:d5:95:17:01 -> 01:80:c2:00:00:0e LLDP 534 TTL = 120 SysName = END-OB-3-UA-EDGE-01.next-uk.next.loc SysDesc = Cisco IOS Software [Bengaluru], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.6.2, RELEASE SOFTWARE (fc7)\nTechnical Support: http://www.cisco.com/techsupport\nCopyright (c) 1986-2021 by Cisco Systems, Inc.\nCompiled Tue 23-Nov-21 12:41 by mcpre
72 85.581692 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
73 85.721576 6c:13:d5:95:17:01 -> 6c:13:d5:95:17:01 LOOP 60 Reply
74 87.581967 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
75 89.582410 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
76 91.583204 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
77 93.583083 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
--More--   78 94.960153 00:26:fd:f0:e4:63 -> 01:80:c2:00:00:0e LLDP 301 TTL = 120 SysName = SIP100-0026fdf0e463 SysDesc = ININ-SIPStation/2.2.8.61.2.1 (ISS100-Rev0; 0026FDF0E463)
79 95.583177 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
80 95.721569 6c:13:d5:95:17:01 -> 6c:13:d5:95:17:01 LOOP 60 Reply
81 97.583903 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
82 99.584539 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
83 101.584572 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
84 103.583921 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
85 105.584638 6c:13:d5:95:17:01 -> 01:00:0c:cc:cc:cd STP 64 RST. Root = 32768/1033/6c:13:d5:95:17:00 Cost = 0 Port = 0x8001
86 105.721208 6c:13:d5:95:17:01 -> 6c:13:d5:95:17:01 LOOP 60 Reply

 

1 REPLY 1

Dan Rowe
Cisco Employee
Cisco Employee

Where are those logs you provided from? Which device did those come from?

Are you able to take a packet capture (EPC is fine) on the edge node interface where this IP phone is connected and share those? 

 

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