Sulakshan Vajipayajula | 5 Jan 15:16 2009

Re: Regarding hostname/ip address based routing in SUA

Ashish,

In IPSP-IPSP mode the SUA layer needs to send only the N-STATE to the
ULP based on remote availability (RKEY activation). Further N-PCSTATE
can be used for nodal congestion indications. 

I believe Network appearance applies for internetworking with SS7
networks only, it can be ignored.

- Sulakshan

-----Original Message-----
From: sigtran-bounces <at> ietf.org [mailto:sigtran-bounces <at> ietf.org] On
Behalf Of Brian F. G. Bidulock
Sent: Monday, December 29, 2008 9:09 AM
To: Ashish Gupta
Cc: Rabindra Nath Tiwari; sigtran <at> ietf.org
Subject: Re: [Sigtran] Regarding hostname/ip address based routing in
SUA

Ashish,

Hostname/IP address in SUA is broken and underspecified.  Further
it attempts to extend SCCP which is outside the scope of the RFC.
I fully expect it to fall out of use.

--brian

Ashish Gupta wrote:                          (Mon, 29 Dec 2008 18:55:35)
> 
(Continue reading)

Graham Bright | 9 Jan 14:56 2009
Picon

M3UA - Links and Linksets

Hi
 
Is the idea of links and linksets obsolete by the concept of a Routing Key. My server is connected to an STP using M3UA. The administrator of this STP always makes references to links and linksets. On my server I have configured one AS with two ASPs.
 
Could someone please clarify,
 
 
Thanks
 
Graham.


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Brian F. G. Bidulock | 9 Jan 21:18 2009

Re: M3UA - Links and Linksets

Graham,

An M3UA SCTP association between an ASP and an SGP for an AS is
equivalent to a link and a group of SCTP associations betweeen
ASP and SGP for the same AS and SG is equivalent to a linkset.

--brian

Graham Bright wrote:                         (Fri, 09 Jan 2009 13:56:07)
> 
>    Hi
> 
>    Is the idea of links and linksets obsolete by the concept of a Routing
>    Key. My server is connected to an STP using M3UA. The administrator of
>    this STP always makes references to links and linksets. On my server I
>    have configured one AS with two ASPs.
> 
>    Could someone please clarify,
> 
> 
>    Thanks
> 
>    Graham.
>      _________________________________________________________________
> 
>    Get the next generation of Free Windows Live Services [1]Click here!
> 
> References
> 
>    1. http://get.live.com/

> _______________________________________________
> Sigtran mailing list
> Sigtran <at> ietf.org
> https://www.ietf.org/mailman/listinfo/sigtran

--

-- 
Brian F. G. Bidulock
bidulock <at> openss7.org
http://www.openss7.org/

SCTP ABORT Issue

Hello Sir,

I am facing a rather strange scenario:

Endpoint A              Endpoint B 
SCTP-INIT-------------------> 
        <----------------------INIT_ACK 
COOKIE-ECHO-----------> 
        <---------------------COOKIE-ACK
M3UA msg------------->
        <--------------ABORT
        <--------------HEARTBEAT

In the Abort Chunk I observe that the T bit is set to 1 indicating that Endpoint B does not have a TCB. What could be the problem here. Is this an OOTB case? Shouldnt TCB be present on Endpoint B as the 4-way handshake has been successfully been completed. If Endpoint B does not have a TCB ? How can it send HEARTBEAT to Endpoint A?

Thanks in advance.

<<capture.txt>>
Regards,
Vivek Kumar


No.     Time        Source                Destination           Protocol Info
  13767 334.575983  10.3.51.1             10.0.0.244            SCTP     INIT 

Frame 13767 (84 bytes on wire, 84 bytes captured)
    Arrival Time: Dec 10, 2008 10:41:51.363728000
    [Time delta from previous captured frame: 0.000280000 seconds]
    [Time delta from previous displayed frame: 334.575983000 seconds]
    [Time since reference or first frame: 334.575983000 seconds]
    Frame Number: 13767
    Frame Length: 84 bytes
    Capture Length: 84 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp]
Linux cooked capture
    Packet type: Sent by us (4)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Intel_9d:40:51 (00:0e:0c:9d:40:51)
    Protocol: IP (0x0800)
Internet Protocol, Src: 10.3.51.1 (10.3.51.1), Dst: 10.0.0.244 (10.0.0.244)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..0. = ECN-Capable Transport (ECT): 0
        .... ...0 = ECN-CE: 0
    Total Length: 68
    Identification: 0x0000 (0)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0xf23e [correct]
        [Good: True]
        [Bad : False]
    Source: 10.3.51.1 (10.3.51.1)
    Destination: 10.0.0.244 (10.0.0.244)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0x00000000
    Checksum: 0x1f5ed1b1 [correct CRC32C]
    INIT chunk (Outbound streams: 32, inbound streams: 32)
        Chunk type: INIT (1)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x00
        Chunk length: 36
        Initiate tag: 0x675882f2
        Advertised receiver window credit (a_rwnd): 102400
        Number of outbound streams: 32
        Number of inbound streams: 32
        Initial TSN: 1733853938
        Supported address types parameter (Supported types: IPv4)
            Parameter type: Supported address types (0x000c)
                0... .... .... .... = Bit: Stop processing of chunk
                .0.. .... .... .... = Bit: Do not report
            Parameter length: 6
            Supported address type: IPv4 address (5)
            Parameter padding: 0000
        IPv4 address parameter (Address: 10.3.51.1)
            Parameter type: IPv4 address (0x0005)
                0... .... .... .... = Bit: Stop processing of chunk
                .0.. .... .... .... = Bit: Do not report
            Parameter length: 8
            IP Version 4 address: 10.3.51.1 (10.3.51.1)

No.     Time        Source                Destination           Protocol Info
  13768 334.576501  10.0.0.244            10.3.51.1             SCTP     INIT_ACK 

Frame 13768 (248 bytes on wire, 248 bytes captured)
    Arrival Time: Dec 10, 2008 10:41:51.364246000
    [Time delta from previous captured frame: 0.000518000 seconds]
    [Time delta from previous displayed frame: 0.000518000 seconds]
    [Time since reference or first frame: 334.576501000 seconds]
    Frame Number: 13768
    Frame Length: 248 bytes
    Capture Length: 248 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp]
Linux cooked capture
    Packet type: Unicast to us (0)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Advantec_a3:a7:96 (00:d0:c9:a3:a7:96)
    Protocol: IP (0x0800)
    Trailer: 22828022
Internet Protocol, Src: 10.0.0.244 (10.0.0.244), Dst: 10.3.51.1 (10.3.51.1)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x02 (DSCP 0x00: Default; ECN: 0x02)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..1. = ECN-Capable Transport (ECT): 1
        .... ...0 = ECN-CE: 0
    Total Length: 228
    Identification: 0x0000 (0)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0xf19c [correct]
        [Good: True]
        [Bad : False]
    Source: 10.0.0.244 (10.0.0.244)
    Destination: 10.3.51.1 (10.3.51.1)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0x675882f2
    Checksum: 0x07e4df8e [correct CRC32C]
    INIT_ACK chunk (Outbound streams: 10, inbound streams: 10)
        Chunk type: INIT_ACK (2)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x00
        Chunk length: 196
        Initiate tag: 0xf5302440
        Advertised receiver window credit (a_rwnd): 74752
        Number of outbound streams: 10
        Number of inbound streams: 10
        Initial TSN: 651912558
        State cookie parameter (Cookie length: 164 bytes)
            Parameter type: State cookie (0x0007)
                0... .... .... .... = Bit: Stop processing of chunk
                .0.. .... .... .... = Bit: Do not report
            Parameter length: 168
            State cookie: 4EA1A65A20F83FA1744FAFBA4D575D110000000000000000...
        Adaptation Layer Indication parameter (Indication: 0)
            Parameter type: Adaptation Layer Indication (0xc006)
                1... .... .... .... = Bit: Skip parameter and continue processing of the chunk
                .1.. .... .... .... = Bit: Do report
            Parameter length: 8
            Indication: 0x00000000

No.     Time        Source                Destination           Protocol Info
  13769 334.576623  10.3.51.1             10.0.0.244            SCTP     COOKIE_ECHO 

Frame 13769 (216 bytes on wire, 216 bytes captured)
    Arrival Time: Dec 10, 2008 10:41:51.364368000
    [Time delta from previous captured frame: 0.000122000 seconds]
    [Time delta from previous displayed frame: 0.000122000 seconds]
    [Time since reference or first frame: 334.576623000 seconds]
    Frame Number: 13769
    Frame Length: 216 bytes
    Capture Length: 216 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp]
Linux cooked capture
    Packet type: Sent by us (4)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Intel_9d:40:51 (00:0e:0c:9d:40:51)
    Protocol: IP (0x0800)
Internet Protocol, Src: 10.3.51.1 (10.3.51.1), Dst: 10.0.0.244 (10.0.0.244)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..0. = ECN-Capable Transport (ECT): 0
        .... ...0 = ECN-CE: 0
    Total Length: 200
    Identification: 0x0001 (1)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0xf1b9 [correct]
        [Good: True]
        [Bad : False]
    Source: 10.3.51.1 (10.3.51.1)
    Destination: 10.0.0.244 (10.0.0.244)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0xf5302440
    Checksum: 0x2fd2dae2 [correct CRC32C]
    COOKIE_ECHO chunk (Cookie length: 164 bytes)
        Chunk type: COOKIE_ECHO (10)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x00
        Chunk length: 168
        Cookie: 4EA1A65A20F83FA1744FAFBA4D575D110000000000000000...

No.     Time        Source                Destination           Protocol Info
  13770 334.577125  10.0.0.244            10.3.51.1             SCTP     COOKIE_ACK 

Frame 13770 (62 bytes on wire, 62 bytes captured)
    Arrival Time: Dec 10, 2008 10:41:51.364870000
    [Time delta from previous captured frame: 0.000502000 seconds]
    [Time delta from previous displayed frame: 0.000502000 seconds]
    [Time since reference or first frame: 334.577125000 seconds]
    Frame Number: 13770
    Frame Length: 62 bytes
    Capture Length: 62 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp]
Linux cooked capture
    Packet type: Unicast to us (0)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Advantec_a3:a7:96 (00:d0:c9:a3:a7:96)
    Protocol: IP (0x0800)
    Trailer: 3F5B1CCD000000000000
Internet Protocol, Src: 10.0.0.244 (10.0.0.244), Dst: 10.3.51.1 (10.3.51.1)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x02 (DSCP 0x00: Default; ECN: 0x02)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..1. = ECN-Capable Transport (ECT): 1
        .... ...0 = ECN-CE: 0
    Total Length: 36
    Identification: 0x0000 (0)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0xf25c [correct]
        [Good: True]
        [Bad : False]
    Source: 10.0.0.244 (10.0.0.244)
    Destination: 10.3.51.1 (10.3.51.1)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0x675882f2
    Checksum: 0xe36cfb68 [correct CRC32C]
    COOKIE_ACK chunk
        Chunk type: COOKIE_ACK (11)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x00
        Chunk length: 4

No.     Time        Source                Destination           Protocol Info
  14003 340.598717  10.3.51.1             10.0.0.244            M3UA (RFC 3332) ASPUP 

Frame 14003 (72 bytes on wire, 72 bytes captured)
    Arrival Time: Dec 10, 2008 10:41:57.386462000
    [Time delta from previous captured frame: 0.010365000 seconds]
    [Time delta from previous displayed frame: 6.021592000 seconds]
    [Time since reference or first frame: 340.598717000 seconds]
    Frame Number: 14003
    Frame Length: 72 bytes
    Capture Length: 72 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp:m3ua]
Linux cooked capture
    Packet type: Sent by us (4)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Intel_9d:40:51 (00:0e:0c:9d:40:51)
    Protocol: IP (0x0800)
Internet Protocol, Src: 10.3.51.1 (10.3.51.1), Dst: 10.0.0.244 (10.0.0.244)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..0. = ECN-Capable Transport (ECT): 0
        .... ...0 = ECN-CE: 0
    Total Length: 56
    Identification: 0x0002 (2)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0xf248 [correct]
        [Good: True]
        [Bad : False]
    Source: 10.3.51.1 (10.3.51.1)
    Destination: 10.0.0.244 (10.0.0.244)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0xf5302440
    Checksum: 0xe6f40bcf [correct CRC32C]
    DATA chunk(ordered, complete segment, TSN: 1733853938, SID: 0, SSN: 0, PPID: 3, payload length: 8 bytes)
        Chunk type: DATA (0)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x03
            .... ...1 = E-Bit: Last segment
            .... ..1. = B-Bit: First segment
            .... .0.. = U-Bit: Ordered deliviery
        Chunk length: 24
        TSN: 1733853938
        Stream Identifier: 0x0000
        Stream sequence number: 0
        Payload protocol identifier: M3UA (3)
MTP 3 User Adaptation Layer
    Version: Release 1 (1)
    Reserved: 0x00
    Message class: ASP state maintenance messages (3)
    Message type: ASP up (ASPUP) (1)
    Message length: 8

No.     Time        Source                Destination           Protocol Info
  14004 340.599054  10.0.0.244            10.3.51.1             SCTP     ABORT 

Frame 14004 (62 bytes on wire, 62 bytes captured)
    Arrival Time: Dec 10, 2008 10:41:57.386799000
    [Time delta from previous captured frame: 0.000337000 seconds]
    [Time delta from previous displayed frame: 0.000337000 seconds]
    [Time since reference or first frame: 340.599054000 seconds]
    Frame Number: 14004
    Frame Length: 62 bytes
    Capture Length: 62 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp]
Linux cooked capture
    Packet type: Unicast to us (0)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Advantec_a3:a7:96 (00:d0:c9:a3:a7:96)
    Protocol: IP (0x0800)
    Trailer: 8EAE7C83000000000000
Internet Protocol, Src: 10.0.0.244 (10.0.0.244), Dst: 10.3.51.1 (10.3.51.1)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x02 (DSCP 0x00: Default; ECN: 0x02)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..1. = ECN-Capable Transport (ECT): 1
        .... ...0 = ECN-CE: 0
    Total Length: 36
    Identification: 0x0000 (0)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0xf25c [correct]
        [Good: True]
        [Bad : False]
    Source: 10.0.0.244 (10.0.0.244)
    Destination: 10.3.51.1 (10.3.51.1)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0xf5302440
    Checksum: 0xaa04fc4b [correct CRC32C]
    ABORT chunk
        Chunk type: ABORT (6)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x01
            .... ...1 = T-Bit: Tag reflected
        Chunk length: 4

No.     Time        Source                Destination           Protocol Info
  14013 340.616916  10.0.0.244            10.3.51.1             SCTP     HEARTBEAT 

Frame 14013 (104 bytes on wire, 104 bytes captured)
    Arrival Time: Dec 10, 2008 10:41:57.404661000
    [Time delta from previous captured frame: 0.003108000 seconds]
    [Time delta from previous displayed frame: 0.017862000 seconds]
    [Time since reference or first frame: 340.616916000 seconds]
    Frame Number: 14013
    Frame Length: 104 bytes
    Capture Length: 104 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp]
Linux cooked capture
    Packet type: Unicast to us (0)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Advantec_a3:a7:96 (00:d0:c9:a3:a7:96)
    Protocol: IP (0x0800)
    Trailer: 261237E7
Internet Protocol, Src: 10.0.0.244 (10.0.0.244), Dst: 10.3.51.1 (10.3.51.1)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x02 (DSCP 0x00: Default; ECN: 0x02)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..1. = ECN-Capable Transport (ECT): 1
        .... ...0 = ECN-CE: 0
    Total Length: 84
    Identification: 0x6723 (26403)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0x8b09 [correct]
        [Good: True]
        [Bad : False]
    Source: 10.0.0.244 (10.0.0.244)
    Destination: 10.3.51.1 (10.3.51.1)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0x675882f2
    Checksum: 0x11e669bd [correct CRC32C]
    HEARTBEAT chunk (Information: 48 bytes)
        Chunk type: HEARTBEAT (4)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x00
        Chunk length: 52
        Heartbeat info parameter (Information: 44 bytes)
            Parameter type: Heartbeat info (0x0001)
                0... .... .... .... = Bit: Stop processing of chunk
                .0.. .... .... .... = Bit: Do not report
            Parameter length: 48
            Heartbeat information: 00020B590A03330100000000000000000000000000000000...

No.     Time        Source                Destination           Protocol Info
  14260 347.760701  10.0.0.244            10.3.51.1             SCTP     HEARTBEAT 

Frame 14260 (104 bytes on wire, 104 bytes captured)
    Arrival Time: Dec 10, 2008 10:42:04.548446000
    [Time delta from previous captured frame: 0.178646000 seconds]
    [Time delta from previous displayed frame: 7.143785000 seconds]
    [Time since reference or first frame: 347.760701000 seconds]
    Frame Number: 14260
    Frame Length: 104 bytes
    Capture Length: 104 bytes
    [Frame is marked: True]
    [Protocols in frame: sll:ip:sctp]
Linux cooked capture
    Packet type: Unicast to us (0)
    Link-layer address type: 1
    Link-layer address length: 6
    Source: Advantec_a3:a7:96 (00:d0:c9:a3:a7:96)
    Protocol: IP (0x0800)
    Trailer: 1A864D80
Internet Protocol, Src: 10.0.0.244 (10.0.0.244), Dst: 10.3.51.1 (10.3.51.1)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x02 (DSCP 0x00: Default; ECN: 0x02)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..1. = ECN-Capable Transport (ECT): 1
        .... ...0 = ECN-CE: 0
    Total Length: 84
    Identification: 0x6724 (26404)
    Flags: 0x04 (Don't Fragment)
        0... = Reserved bit: Not set
        .1.. = Don't fragment: Set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: SCTP (0x84)
    Header checksum: 0x8b08 [correct]
        [Good: True]
        [Bad : False]
    Source: 10.0.0.244 (10.0.0.244)
    Destination: 10.3.51.1 (10.3.51.1)
Stream Control Transmission Protocol, Src Port: m3ua (2905), Dst Port: m3ua (2905)
    Source port: 2905
    Destination port: 2905
    Verification tag: 0x675882f2
    Checksum: 0x92103438 [correct CRC32C]
    HEARTBEAT chunk (Information: 48 bytes)
        Chunk type: HEARTBEAT (4)
            0... .... = Bit: Stop processing of the packet
            .0.. .... = Bit: Do not report
        Chunk flags: 0x00
        Chunk length: 52
        Heartbeat info parameter (Information: 44 bytes)
            Parameter type: Heartbeat info (0x0001)
                0... .... .... .... = Bit: Stop processing of chunk
                .0.. .... .... .... = Bit: Do not report
            Parameter length: 48
            Heartbeat information: 00020B590A03330100000000000000000000000000000000...
_______________________________________________
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Sigtran <at> ietf.org
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Brian F. G. Bidulock | 12 Jan 22:14 2009

Re: SCTP ABORT Issue

Vivek,

Looks to me like a bug in Endpoint B.

--brian

Kumar, Vivek (NSN - IN/Bangalore) wrote:     (Mon, 12 Jan 2009 15:08:34)
> 
>    Hello Sir,
> 
>    I am facing a rather strange scenario:
> 
>    Endpoint A              Endpoint B
>    SCTP-INIT------------------->
>            <----------------------INIT_ACK
>    COOKIE-ECHO----------->
>            <---------------------COOKIE-ACK
>    M3UA msg------------->
>            <--------------ABORT
>            <--------------HEARTBEAT
> 
>    In the Abort Chunk I observe that the T bit is set to 1 indicating
>    that Endpoint B does not have a TCB. What could be the problem here.
>    Is this an OOTB case? Shouldnt TCB be present on Endpoint B as the
>    4-way handshake has been successfully been completed. If Endpoint B
>    does not have a TCB ? How can it send HEARTBEAT to Endpoint A?
> 
>    Thanks in advance.
> 
>    <<capture.txt>>
>    Regards,
>    Vivek Kumar

> _______________________________________________
> Sigtran mailing list
> Sigtran <at> ietf.org
> https://www.ietf.org/mailman/listinfo/sigtran

--

-- 
Brian F. G. Bidulock
bidulock <at> openss7.org
http://www.openss7.org/
santhanakrishnan | 15 Jan 02:41 2009

[M3UA] Single Exchange and Double Exchange

Hi Brian,
        Can one implementation support SE and DE models at the same time ? Or does it have to be configured priori and only one of the models can be active at a time ? Is there any M3UA procedure which can help in dynamic negotiation of SE/DE models.
 
regards
Santhanakrishnan
 
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Re: SCTP ABORT Issue

Hello Brian,

Thanks for the response. It would be really helpful if you could point
what the potential bug could be. 

Regards,
Vivek Kumar
Ph: +918040553823

-----Original Message-----
From: ext Brian F. G. Bidulock [mailto:bidulock <at> openss7.org] 
Sent: Tuesday, January 13, 2009 2:44 AM
To: Kumar, Vivek (NSN - IN/Bangalore)
Cc: sigtran <at> ietf.org
Subject: Re: [Sigtran] SCTP ABORT Issue

Vivek,

Looks to me like a bug in Endpoint B.

--brian

Kumar, Vivek (NSN - IN/Bangalore) wrote:     (Mon, 12 Jan 2009 15:08:34)
> 
>    Hello Sir,
> 
>    I am facing a rather strange scenario:
> 
>    Endpoint A              Endpoint B
>    SCTP-INIT------------------->
>            <----------------------INIT_ACK
>    COOKIE-ECHO----------->
>            <---------------------COOKIE-ACK
>    M3UA msg------------->
>            <--------------ABORT
>            <--------------HEARTBEAT
> 
>    In the Abort Chunk I observe that the T bit is set to 1 indicating
>    that Endpoint B does not have a TCB. What could be the problem
here.
>    Is this an OOTB case? Shouldnt TCB be present on Endpoint B as the
>    4-way handshake has been successfully been completed. If Endpoint B
>    does not have a TCB ? How can it send HEARTBEAT to Endpoint A?
> 
>    Thanks in advance.
> 
>    <<capture.txt>>
>    Regards,
>    Vivek Kumar

> _______________________________________________
> Sigtran mailing list
> Sigtran <at> ietf.org
> https://www.ietf.org/mailman/listinfo/sigtran

--
Brian F. G. Bidulock
bidulock <at> openss7.org
http://www.openss7.org/
Ankit Kumar Sharma | 17 Jan 15:13 2009
Picon

Re: SCTP ABORT Issue

Vivek,


  Have you checked whether a single instance(implementation) of SCTP is running on the endpoint B? 

I have seen a similar issue when, unknowingly,  some vendor's SCTP and kernel SCTP were running on the same machine, simultaneously.

Cheers
Ankit

On Fri, Jan 16, 2009 at 12:31 PM, Kumar, Vivek (NSN - IN/Bangalore) <vivek.kumar <at> nsn.com> wrote:
Hello Brian,

Thanks for the response. It would be really helpful if you could point
what the potential bug could be.


Regards,
Vivek Kumar
Ph: +918040553823

-----Original Message-----
From: ext Brian F. G. Bidulock [mailto:bidulock <at> openss7.org]
Sent: Tuesday, January 13, 2009 2:44 AM
To: Kumar, Vivek (NSN - IN/Bangalore)
Cc: sigtran <at> ietf.org
Subject: Re: [Sigtran] SCTP ABORT Issue

Vivek,

Looks to me like a bug in Endpoint B.

--brian

Kumar, Vivek (NSN - IN/Bangalore) wrote:     (Mon, 12 Jan 2009 15:08:34)
>
>    Hello Sir,
>
>    I am facing a rather strange scenario:
>
>    Endpoint A              Endpoint B
>    SCTP-INIT------------------->
>            <----------------------INIT_ACK
>    COOKIE-ECHO----------->
>            <---------------------COOKIE-ACK
>    M3UA msg------------->
>            <--------------ABORT
>            <--------------HEARTBEAT
>
>    In the Abort Chunk I observe that the T bit is set to 1 indicating
>    that Endpoint B does not have a TCB. What could be the problem
here.
>    Is this an OOTB case? Shouldnt TCB be present on Endpoint B as the
>    4-way handshake has been successfully been completed. If Endpoint B
>    does not have a TCB ? How can it send HEARTBEAT to Endpoint A?
>
>    Thanks in advance.
>
>    <<capture.txt>>
>    Regards,
>    Vivek Kumar

> _______________________________________________
> Sigtran mailing list
> Sigtran <at> ietf.org
> https://www.ietf.org/mailman/listinfo/sigtran


--
Brian F. G. Bidulock
bidulock <at> openss7.org
http://www.openss7.org/
_______________________________________________
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https://www.ietf.org/mailman/listinfo/sigtran

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Gmane