user manual
Table Of Contents
- Cisco ONS 15454 SDH Reference Manual
- Contents
- About this Guide
- Shelf and FMEC Hardware
- Common Control Cards
- Electrical Cards
- Optical Cards
- Ethernet Cards
- Storage Access Networking Cards
- Card Protection
- Cisco Transport Controller Operation
- Security and Timing
- Circuits and Tunnels
- SDH Topologies and Upgrades
- CTC Network Connectivity
- Alarm Monitoring and Management
- Ethernet Operation
- Hardware Specifications
- A.1 Shelf Specifications
- A.2 SFP Specifications
- A.3 General Card Specifications
- A.4 Common Control Card Specifications
- A.5 Electrical Card and FMEC Specifications
- A.5.1 E1-N-14 Card Specifications
- A.5.2 E1-42 Card Specifications
- A.5.3 E3-12 Card Specifications
- A.5.4 DS3i-N-12 Card Specifications
- A.5.5 STM1E-12 Card Specifications
- A.5.6 BLANK Card
- A.5.7 FMEC-E1 Specifications
- A.5.8 FMEC-DS1/E1 Card Specifications
- A.5.9 FMEC E1-120NP Card Specifications
- A.5.10 FMEC E1-120PROA Card Specifications
- A.5.11 FMEC E1-120PROB Card Specifications
- A.5.12 E1-75/120 Impedance Conversion Panel Specifications
- A.5.13 FMEC-E3/DS3 Card Specifications
- A.5.14 FMEC STM1E 1:1 Card Specifications
- A.5.15 FMEC-BLANK Card Specifications
- A.5.16 MIC-A/P Card Specifications
- A.5.17 MIC-C/T/P Card Specifications
- A.6 Optical Card Specifications
- A.6.1 OC3 IR 4/STM1 SH 1310 Card Specifications
- A.6.2 OC3 IR/STM1 SH 1310-8 Card Specifications
- A.6.3 OC12 IR/STM4 SH 1310 Card Specifications
- A.6.4 OC12 LR/STM4 LH 1310 Card Specifications
- A.6.5 OC12 LR/STM4 LH 1550 Card Specifications
- A.6.6 OC12 IR/STM4 SH 1310-4 Card Specifications
- A.6.7 OC48 IR/STM16 SH AS 1310 Card Specifications
- A.6.8 OC48 LR/STM16 LH AS 1550 Card Specifications
- A.6.9 OC48 ELR/STM16 EH 100 GHz Card Specifications
- A.6.10 OC192 SR/STM64 IO 1310 Card Specifications
- A.6.11 OC192 IR/STM64 SH 1550 Card Specifications
- A.6.12 OC192 LR/STM64 LH 1550 Card Specifications
- A.6.13 OC192 LR/STM64 LH ITU 15xx.xx Card Specifications
- A.7 Ethernet Card Specifications
- A.8 Storage Access Networking Card Specifications
- Administrative and Service States
- Network Element Defaults
- Index

REVIEW DRAFT—CISCO CONFIDENTIAL
14-19
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 14 Ethernet Operation
14.4 G-Series Circuit Configurations
14.4 G-Series Circuit Configurations
This section explains G-Series point-to-point circuits and manual cross-connects. Ethernet manual
cross-connects allow you to cross connect individual Ethernet circuits to an STM-N channel on the
ONS 15454 SDH optical interface and also to bridge non-ONS SDH network segments.
14.4.1 G-Series Point-to-Point Ethernet Circuits
G-Series cards support point-to-point circuit configurations (Figure 14-16). Provisionable circuit sizes
are VC4, VC4-2c, VC4-3c, VC4-4c, VC4-8c, and VC4-16C. Each Ethernet port maps to a unique
STM-N circuit of the G-Series card.
Figure 14-16 G-Series Point-to-Point Circuit
The G-Series supports any combination of up to four circuits from the list of valid circuit sizes; however,
the circuit sizes can add up to no more than VC4-16.
Because of hardware constraints, the card imposes an additional restriction on the combinations of
circuits that can be dropped onto a G-Series card. These restrictions are transparently enforced by the
ONS 15454 SDH, and you do not need to keep track of restricted circuit combinations.
When a single VC4-8c terminates on a card, the remaining circuits on that card can be another single
VC4-8c or any combination of circuits of VC4-4c size or less that add up to no more than VC4-4c (that
is, a total of 12 VC4s on the card).
If VC4-8c circuits are not being dropped on the card, the full VC4-16 bandwidth can be used with no
restrictions (for example, using either a single VC4-16C or 4 VC4-4c circuits).
Note The VC4-8c restriction only applies when a single VC4-8c circuit is dropped; therefore, you can easily
minimize the impact of this restriction. Group the VC4-8c circuits together on a card separate from
circuits of other sizes. The grouped circuits can be dropped on other G-Series cards on the
ONS 15454 SDH.
Caution G-Series cards do not connect with E-series cards.
14.4.2 G-Series Manual Cross-Connects
ONS 15454 SDHs require end-to-end CTC visibility between nodes for normal provisioning of Ethernet
circuits. When other vendors’ equipment sits between ONS 15454 SDHs, open system interconnection
(OSI)/Transient Addressing for Related Processes (TARP)-based equipment does not allow tunneling of
the ONS 15454 SDH TCP/IP-based DCC. To circumvent inconsistent DCCs, the Ethernet circuit must
be manually cross connected to an STM channel using the non-ONS network. Manual cross-connects
allows an Ethernet circuit to run from ONS node to ONS node while utilizing the non-ONS network
(Figure 14-17).
67830
Point-to-Point Circuit
ONS Node ONS Node
Gigabit Ethernet Gigabit Ethernet