Figure 12-10 Tl1 Tunnels; Table 12-15 Tl1 And Static Ip-Over-Clns Tunnels Comparison - Cisco ONS 15454 DWDM Reference Manual

12.6 Using the CTC Launcher Application to Manage Multiple ONS Nodes
Figure 12-10 TL1 Tunnels
Tunnel provisioning
IP DCN
CTC
TL1 tunnel
TL1 tunnels provide several advantages over static IP-over-CLNS tunnels. Because tunnel provisioning
is needed only at the CTC computer, they are faster to set up. Because they use TL1 for TCP transport,
they are more secure. TL1 tunnels also provide better flow control. On the other hand, IP over CLNS
tunnels require less overhead and usually provide a slight performance edge over TL1 Tunnels
(depending on network conditions). TL1 tunnels do not support all IP applications such as SNMP and
RADIUS Authentication.
Table 12-15 TL1 and Static IP-Over-CLNS Tunnels Comparison
Category
Setup
Performance
Support all IP
applications
ITU Standard
Tunnel traffic control
Security setup
Cisco ONS 15454 DWDM Reference Manual, R8.5
12-22
Central office
Other vendor
GNE 1
IP + OSI
TL1 tunnel
Other vendor
GNE 2
IP
Table 12-15
Static
IP-Over-CLNS TL1 Tunnel
Complex Simple
Best Average to
good
Yes No
Yes No
Good Very good
Complex No setup
needed
Chapter 12
ONS ENE 1
OSI/DCC
IP/DCC
ONS ENE 2
IP/DCC
OSI/DCC
shows a comparison between the two types of tunnels.
Comments
Requires provisioning at ONS NE, GNE, and DCN routers. For
TL1 tunnels, provisioning is needed at CTC computer.
Static tunnels generally provide better performance than TL1
tunnels, depending on TL1 encoding used. LV+Binary provides
the best performance. Other encoding will produce slightly
slower TL1 tunnel performance.
TL1 tunnels do not support SNMP or RADIUS Server IP
applications.
Only the static IP-over-CLNS tunnels meet ITU standards. TL1
tunnels are new.
Both tunnel types provide good traffic control
Static IP-over-CLNS tunnels require careful planning. Because
TL1 tunnels are carried by TL1, no security provisioning is
needed.
Cisco Transport Controller Operation
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