Osi Virtual Routers - Cisco ONS 15600 Reference Manual

9.6.7 OSI Virtual Routers

Figure 9-23
UDP
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Figure 9-24
OSS
FTP File
Server
The ONS 15600 SDH uses FT–TD for the following file transfer processes:
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9.6.7 OSI Virtual Routers
The ONS 15600 SDH 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:
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Cisco ONS 15600 SDH Reference Manual, Release 9.0
9-36
T–TD Protocol Flow
OSS
TL1
TL1
TCP UDP TCP
IPv4 IPv4
LLC1 LLC1
LAN LAN
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.
FT–TD Protocol Flow
FTP / IP
FTP
Client
Software downloads
Database backups and restores
TID-to-NSAP resolution
TARP data cache
IP-over-CLNS tunnels
FTAM
GNE
TL1 Gateway
ACSE
Presentation
Session
TP4
ISIS / CLNS
LAPD
DCC
GNE
FT-TD
FTAM / OSI
FTAM
Responder
Chapter 9 Management Network Connectivity
ENE
TL1 Gateway
ACSE TL1
Presentation
Session
TP4
ISIS / CLNS
LAPD
DCC
ENE
FTAM
Initiator
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