SIP/SDP Invite Request Not Routing Across VLAN(S)

Hi Everyone,

I've been working on an odd IP phone issue with our NEC SV8100.  The behavior is that paging only works at one of two buildings that share the network via a PtP link; Building A (VLAN4) cannot page Building B (VLAN14), the page is not heard, but Building B can page Building A.  Phones work fine station to station regardless of the building.  Also, the NEC system is at Building A.

Thanks to Wireshark and some helpful people, I've found via P-cap testing that SIP/SDP invite requests are not routing from VLAN4 to VLAN14, but the notify request does.

The switches at Building A are N4032F's in layer 3, and PC5584's in Layer 2.  The Switches at Building B are N4032F's in layer 3, and N2048P's in Layer 2.

 

Here is an example within the working VLAN4:

No. Time Source Destination Protocol Length Info
10132 21:09:25.809325 10.1.4.10 10.1.4.37 SIP 657 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 10132: 657 bytes on wire (5256 bits), 657 bytes captured (5256 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
11178 21:09:26.458849 10.1.4.10 10.1.4.37 SIP/SDP 873 Request: INVITE sip:6007@10.1.4.37:5060 | (application/x-necsipext2mlv1)

Frame 11178: 873 bytes on wire (6984 bits), 873 bytes captured (6984 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (INVITE)

No. Time Source Destination Protocol Length Info
11380 21:09:26.565439 10.1.4.10 10.1.4.37 SIP 353 Request: ACK sip:6007@10.1.4.37:5060 |

Frame 11380: 353 bytes on wire (2824 bits), 353 bytes captured (2824 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (ACK)

No. Time Source Destination Protocol Length Info
13951 21:09:31.390474 10.1.4.10 10.1.4.37 SIP 445 Request: BYE sip:6007@10.1.4.37:5060 |

Frame 13951: 445 bytes on wire (3560 bits), 445 bytes captured (3560 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (BYE)

No. Time Source Destination Protocol Length Info
13955 21:09:31.405705 10.1.4.10 10.1.4.37 SIP 679 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 13955: 679 bytes on wire (5432 bits), 679 bytes captured (5432 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
17450 21:10:09.179336 10.1.4.10 10.1.4.37 SIP 732 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 17450: 732 bytes on wire (5856 bits), 732 bytes captured (5856 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
17511 21:10:11.681149 10.1.4.10 10.1.4.37 SIP 721 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 17511: 721 bytes on wire (5768 bits), 721 bytes captured (5768 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
17620 21:10:21.104833 10.1.4.10 10.1.4.37 SIP 512 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 17620: 512 bytes on wire (4096 bits), 512 bytes captured (4096 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
17636 21:10:22.645353 10.1.4.10 10.1.4.37 SIP/SDP 873 Request: INVITE sip:6007@10.1.4.37:5060 | (application/x-necsipext2mlv1)

Frame 17636: 873 bytes on wire (6984 bits), 873 bytes captured (6984 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (INVITE)

No. Time Source Destination Protocol Length Info
17642 21:10:22.725099 10.1.4.10 10.1.4.37 SIP 353 Request: ACK sip:6007@10.1.4.37:5060 |

Frame 17642: 353 bytes on wire (2824 bits), 353 bytes captured (2824 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (ACK)

No. Time Source Destination Protocol Length Info
17648 21:10:22.800072 10.1.4.10 10.1.4.37 SIP 657 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 17648: 657 bytes on wire (5256 bits), 657 bytes captured (5256 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
18013 21:10:29.261032 10.1.4.10 10.1.4.37 SIP 445 Request: BYE sip:6007@10.1.4.37:5060 |

Frame 18013: 445 bytes on wire (3560 bits), 445 bytes captured (3560 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (BYE)

No. Time Source Destination Protocol Length Info
18016 21:10:29.459069 10.1.4.10 10.1.4.37 SIP 679 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 18016: 679 bytes on wire (5432 bits), 679 bytes captured (5432 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
18036 21:10:30.377696 10.1.4.10 10.1.4.37 SIP 365 Status: 200 OK (1 binding) |

Frame 18036: 365 bytes on wire (2920 bits), 365 bytes captured (2920 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (200)

No. Time Source Destination Protocol Length Info
18127 21:10:40.554206 10.1.4.10 10.1.4.37 SIP 512 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 18127: 512 bytes on wire (4096 bits), 512 bytes captured (4096 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
23492 21:11:48.875389 10.1.4.10 10.1.4.37 SIP 512 Request: NOTIFY sip:6007@10.1.4.37:5060 |

Frame 23492: 512 bytes on wire (4096 bits), 512 bytes captured (4096 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: NecPlatf_9a:16:38 (00:60:b9:9a:16:38)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.4.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

 

And here is an example from the non-working VLAN4 to VLAN14:

No. Time Source Destination Protocol Length Info
71271 20:52:57.244918 10.1.4.10 10.1.14.37 SIP 542 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 71271: 542 bytes on wire (4336 bits), 542 bytes captured (4336 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
71272 20:52:57.244918 10.1.4.10 10.1.14.37 SIP 542 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 71272: 542 bytes on wire (4336 bits), 542 bytes captured (4336 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
79170 20:53:02.764550 10.1.4.10 10.1.14.37 SIP 693 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 79170: 693 bytes on wire (5544 bits), 693 bytes captured (5544 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
79171 20:53:02.764551 10.1.4.10 10.1.14.37 SIP 693 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 79171: 693 bytes on wire (5544 bits), 693 bytes captured (5544 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
79557 20:53:03.038110 10.1.4.10 10.1.14.37 SIP 355 Request: BYE sip:6014@10.1.14.37:5060 |

Frame 79557: 355 bytes on wire (2840 bits), 355 bytes captured (2840 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (BYE)

No. Time Source Destination Protocol Length Info
79558 20:53:03.038110 10.1.4.10 10.1.14.37 SIP 355 Request: BYE sip:6014@10.1.14.37:5060 |

Frame 79558: 355 bytes on wire (2840 bits), 355 bytes captured (2840 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5080, Dst Port: 5060
Session Initiation Protocol (BYE)

No. Time Source Destination Protocol Length Info
79615 20:53:03.090633 10.1.4.10 10.1.14.37 SIP 522 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 79615: 522 bytes on wire (4176 bits), 522 bytes captured (4176 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
79616 20:53:03.090635 10.1.4.10 10.1.14.37 SIP 522 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 79616: 522 bytes on wire (4176 bits), 522 bytes captured (4176 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
80278 20:53:03.545511 10.1.4.10 10.1.14.37 SIP 338 Status: 200 OK |

Frame 80278: 338 bytes on wire (2704 bits), 338 bytes captured (2704 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (200)

No. Time Source Destination Protocol Length Info
80279 20:53:03.545512 10.1.4.10 10.1.14.37 SIP 338 Status: 200 OK |

Frame 80279: 338 bytes on wire (2704 bits), 338 bytes captured (2704 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (200)

No. Time Source Destination Protocol Length Info
80342 20:53:03.586979 10.1.4.10 10.1.14.37 SIP 793 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 80342: 793 bytes on wire (6344 bits), 793 bytes captured (6344 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
80343 20:53:03.586979 10.1.4.10 10.1.14.37 SIP 793 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 80343: 793 bytes on wire (6344 bits), 793 bytes captured (6344 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
87995 20:53:06.949328 10.1.4.10 10.1.14.37 SIP 536 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 87995: 536 bytes on wire (4288 bits), 536 bytes captured (4288 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
87996 20:53:06.949329 10.1.4.10 10.1.14.37 SIP 536 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 87996: 536 bytes on wire (4288 bits), 536 bytes captured (4288 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
92965 20:53:08.590401 10.1.4.10 10.1.14.37 SIP 542 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 92965: 542 bytes on wire (4336 bits), 542 bytes captured (4336 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
92966 20:53:08.590401 10.1.4.10 10.1.14.37 SIP 542 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 92966: 542 bytes on wire (4336 bits), 542 bytes captured (4336 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
107688 20:53:13.704016 10.1.4.10 10.1.14.37 SIP 536 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 107688: 536 bytes on wire (4288 bits), 536 bytes captured (4288 bits) on interface 0
Ethernet II, Src: Dell_19:99:a2 (f8:b1:56:19:99:a2), Dst: Dell_b6:a3:e7 (d0:67:e5:b6:a3:e7)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

No. Time Source Destination Protocol Length Info
107689 20:53:13.704016 10.1.4.10 10.1.14.37 SIP 536 Request: NOTIFY sip:6014@10.1.14.37:5060 |

Frame 107689: 536 bytes on wire (4288 bits), 536 bytes captured (4288 bits) on interface 0
Ethernet II, Src: NecPlatf_d9:c2:d5 (00:60:b9:d9:c2:d5), Dst: Dell_19:99:a2 (f8:b1:56:19:99:a2)
Internet Protocol Version 4, Src: 10.1.4.10, Dst: 10.1.14.37
User Datagram Protocol, Src Port: 5081, Dst Port: 5060
Session Initiation Protocol (NOTIFY)

 

Am I missing something basic in the switch routing config?

Thanks!