| msdp.length | Length | Unsigned 16-bit integer | MSDP TLV Length |
| msdp.not.entry_count | Entry Count | Unsigned 24-bit integer | Entry Count in Notification messages |
| msdp.not.error | Error Code | Unsigned 8-bit integer | Indicates the type of Notification |
| msdp.not.error_sub | Error subode | Unsigned 8-bit integer | Error subcode |
| msdp.not.ipv4 | IPv4 address | IPv4 address | Group/RP/Source address in Notification messages |
| msdp.not.o | Open-bit | Unsigned 8-bit integer | If clear, the connection will be closed |
| msdp.not.res | Reserved | Unsigned 24-bit integer | Reserved field in Notification messages |
| msdp.not.sprefix_len | Sprefix len | Unsigned 8-bit integer | Source prefix length in Notification messages |
| msdp.sa.entry_count | Entry Count | Unsigned 8-bit integer | MSDP SA Entry Count |
| msdp.sa.group_addr | Group Address | IPv4 address | The group address the active source has sent data to |
| msdp.sa.reserved | Reserved | Unsigned 24-bit integer | Transmitted as zeros and ignored by a receiver |
| msdp.sa.rp_addr | RP Address | IPv4 address | Active source's RP address |
| msdp.sa.sprefix_len | Sprefix len | Unsigned 8-bit integer | The route prefix length associated with source address |
| msdp.sa.src_addr | Source Address | IPv4 address | The IP address of the active source |
| msdp.sa_req.group_addr | Group Address | IPv4 address | The group address the MSDP peer is requesting |
| msdp.sa_req.res | Reserved | Unsigned 8-bit integer | Transmitted as zeros and ignored by a receiver |
| msdp.type | Type | Unsigned 8-bit integer | MSDP TLV type |