I tried to:
Estabilish MPLS session between 2 routers with more than 1000 connected networks.
I saw this problem:
Session was not estabilished. I see in traffic dump - Length PDU (in “Address message”) was 4108 (more than 4096 bytes). Second router send FIN with a message: “Status Data: Bad PDU Length (0x3)”
I expected to see:
“Address message” should be splited in some LDP messages with lengh less than 4096 bytes.
Steps to repeat this issue:
I tried this configuration on CCR-1036, RB912, RB951. ~1200 connected networks on Loopback and MPLS between 2 routers.
Is it posible to split “Address message” to some LDP messages with lengh less than 4096 bytes, like in Cisco?
PDU Length
[flash=]Frame 9: 134 bytes on wire (1072 bits), 134 bytes captured (1072 bits)
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Internet Protocol Version 4, Src: 10.7.6.145, Dst: 10.7.6.146
Transmission Control Protocol, Src Port: 646 (646), Dst Port: 50297 (50297), Seq: 4089, Ack: 55, Len: 68
[4 Reassembled TCP Segments (4112 bytes): #6(1348), #7(1348), #8(1348), #9(68)]
Label Distribution Protocol
Version: 1
PDU Length: 4108
LSR ID: 192.168.23.14
Label Space ID: 0
Address Message[/flash]
Error message
Frame 12: 98 bytes on wire (784 bits), 98 bytes captured (784 bits)
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Internet Protocol Version 4, Src: 10.7.6.146, Dst: 10.7.6.145
Transmission Control Protocol, Src Port: 50297 (50297), Dst Port: 646 (646), Seq: 149, Ack: 4157, Len: 32
Label Distribution Protocol
Version: 1
PDU Length: 28
LSR ID: 10.9.255.21
Label Space ID: 0
Notification Message
0… … = U bit: Unknown bit not set
Message Type: Notification Message (0x1)
Message Length: 18
Message ID: 0x00046154
Status TLV
00.. … = TLV Unknown bits: Known TLV, do not Forward (0x00)
TLV Type: Status TLV (0x300)
TLV Length: 10
Status
1… … = E Bit: Fatal Error Notification
.0.. … = F Bit: Notification should NOT be Forwarded
..00 0000 0000 0000 0000 0000 0000 0011 = Status Data: Bad PDU Length (0x3)
Message ID: 0x00000000
Message Type: Unknown (0x0000)