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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 8 Cisco Transport Controller Operation
8.8 TCC2/TCC2P Card Reset
TL1 tunnel specifications and general capabilities include:
• Each tunnel generally supports between six to eight ENEs, depending on the number of tunnels at
the ENE.
• Each CTC session can support up to 32 tunnels.
• The TL1 tunnel database is stored locally in the CTC Preferences file.
• Automatic tunnel reconnection when the tunnel goes down.
• Each ONS NE can support at least 16 concurrent tunnels.
8.8 TCC2/TCC2P Card Reset
You can reset the ONS 15454 TCC2/TCC2P card by using CTC (a soft reset) or by physically reseating
a TCC2/TCC2P card (a hard reset). A soft reset reboots the TCC2/TCC2P card and reloads the operating
system and the application software. Additionally, a hard reset temporarily removes power from the
TCC2/TCC2P card and clears all buffer memory.
You can apply a soft reset from CTC to either an active or standby TCC2/TCC2P card without affecting
traffic. If you need to perform a hard reset on an active TCC2/TCC2P card, put the TCC2/TCC2P card
into standby mode first by performing a soft reset.
Note When a CTC reset is performed on an active TCC2/TCC2P card, the AIC-I cards go through an
initialization process and also reset because AIC-I cards are controlled by the active TCC2/TCC2P.
8.9 TCC2/TCC2P Card Database
When dual TCC2/TCC2P cards are installed in the ONS 15454, each TCC2/TCC2P card hosts a separate
database; therefore, the protect card database is available if the database on the working TCC2/TCC2P
fails. You can also store a backup version of the database on the workstation running CTC. This
Potential to breach DCN
from DCC using IP.
Possible Not possible A potential exists to breach a DCN from a DCC using IP. This
potential does not exist for TL1 tunnels.
IP route management Expensive Automatic For static IP-over-CLNS tunnels, route changes require manual
provisioning at network routers, GNEs, and ENEs. For TL1
tunnels, route changes are automatic.
Flow control Weak Strong TL1 tunnels provide the best flow control.
Bandwidth sharing
among multiple
applications
Weak Best —
Tunnel lifecycle Fixed CTC session TL1 tunnels are terminated when the CTC session ends. Static
IP-over-CLNS tunnels exist until they are deleted in CTC.
Table 8-13 TL1 and Static IP-Over-CLNS Tunnels Comparison (continued)
Category
Static
IP-Over-CLNS TL1 Tunnel Comments