Hi ,
The Sub-Type in FEC Stack is defined in RFC4379 as follow:
Sub-Type Length Value Field
-------- ------ -----------
............
9 10 "FEC 128" Pseudowire (deprecated)
-----current name
10 14 "FEC 128" Pseudowire
11 16+ "FEC 129" Pseudowire
............
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Remote PE Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PW ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PW Type | Must Be Zero |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
FEC 128 Pseudowire (Deprecated)
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sender's PE Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Remote PE Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PW ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PW Type | Must Be Zero |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
FEC 128 Pseudowire
But in packet-mpls-echo.c:209, It is defined as:
.............
#define TLV_FEC_STACK_L2_CID_OLD 9 -----CID? old name?
#define TLV_FEC_STACK_L2_CID_NEW 10
.............
And the hf is defined like this:
.............
/*packet-mpls-echo.c:1219*/
{ &hf_mpls_echo_tlv_fec_l2cid_sender,
{ "Sender's PE Address",
"mpls_echo.tlv.fec.l2cid_sender",
FT_IPv4, BASE_NONE, NULL, 0x0, "MPLS ECHO TLV
FEC Stack L2CID Sender", HFILL}
},
{ &hf_mpls_echo_tlv_fec_l2cid_remote,
{ "Remote PE Address",
"mpls_echo.tlv.fec.l2cid_remote",
FT_IPv4, BASE_NONE, NULL, 0x0, "MPLS ECHO TLV
FEC Stack L2CID Remote", HFILL}
},
{ &hf_mpls_echo_tlv_fec_l2cid_vcid,
{ "VC ID", "mpls_echo.tlv.fec.l2cid_vcid",
FT_UINT32, BASE_DEC, NULL, 0x0, "MPLS ECHO TLV
FEC Stack L2CID VCID", HFILL}
},
.............
For example, the CID VCID should be 'PW ID' of FEC 128 rather than some
old or invalid alias.
This may confuse the users.
Best Regards,
Jeff
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