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Cisco ONS 15600 Reference Manual, R7.2
Chapter 9 Management Network Connectivity
9.7.7 OSI Virtual Routers
Figure 9-23 T–TD Protocol Flow
•
FT–TD—Performs an FTP conversion between FTAM and FTP. The FT–TD gateway entity
includes an FTAM responder (server) and an FTP client, allowing FTAM initiators (clients) to store,
retrieve, or delete files from an FTP server. The FT–TD gateway is unidirectional and is driven by
the FTAM initiator. The FT–TD FTAM responder exchanges messages with the FTAM initiator
over the full OSI stack. Figure 9-24 shows the FT–TD protocol flow.
Figure 9-24 FT–TD Protocol Flow
The ONS 15600 uses FT–TD for the following file transfer processes:
•
Software downloads
•
Database backups and restores
9.7.7 OSI Virtual Routers
The ONS 15600 supports twelve OSI virtual routers. The routers are provisioned on the Provisioning >
OSI > Routers tab. Each router has an editable manual area address and a unique NSAP System ID that
is set to the node MAC address + n. For Router 1, n = 0. For Router 2, n = 1. For Router 3, n = 2, and
for Router12, n = 11. Each router can be enabled and connected to different OSI routing areas. However,
Router 1 is the primary router, and it must be enabled before Routers 2 through 12 can be enabled. The
Router 1 manual area address and System ID create the NSAP address assigned to the node’s TID. In
addition, Router 1 supports OSI TARP, mediation, and tunneling functions that are not supported by
Routers 2 through 12. These include:
•
TID-to-NSAP resolution
•
TARP data cache
•
IP-over-CLNS tunnels
•
FTAM
131954
GNEOSS
TL1 Gateway
DCC
LAPD
ISIS / CLNS
TP4
Session
Presentation
ACSE
LAN
LLC1
IPv4
UDP TCP
TL1
LAN
LLC1
IPv4
TL1
UDP TCP
DCC
LAPD
ISIS / CLNS
TP4
Session
Presentation
ACSE TL1
TL1 Gateway
ENE
FT-TD
ENE
FTP File
Server
OSS
FTP
Client
FTAM
Initiator
FTAM
Responder
GNE
FTAM / OSIFTP / IP
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