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16-8

Cisco ONS 15310-CL Ethernet Card Software Feature and Configuration Guide, R5.0

June 2005

Chapter 16      CE-100T-8 Ethernet Operation

  CE-100T-8 SONET Circuits and Features

CE-100T-8 STS/VT Allocation Tab

The CE-100T-8 has two pools, each with a maximum capacity of three STSs. At the CTC card-level view 
under the Maintenance tab, the STS/VT Allocation tab displays how the provisioned circuits populate 
the two pools. This information can be useful in freeing up the bandwidth required for provisioning a 
circuit, if there is not enough existing capacity on any one pool for provisioning the desired circuit. The 
user can look at the distribution of the existing circuits among the two pools and decide which circuits 
to delete in order to free up space for the desired circuit. 

Figure 16-4 CE-100T-8 STS/VT Allocation Tab

For example if a user needs to provision an STS-3c or STS-1-3v

 

on the CE-100T-8 card shown in 

Figure 16-4

, an STS-3c or STS-1-3v worth of bandwidth is not available from either of the two pools. 

The user needs to delete circuits from the same pool to free up bandwidth. If the bandwidth is available 
but scattered among the pools, the circuit cannot be provisioned. 

Looking at the POS Port Map table, the user can determine which circuits belong to which pools. The 
Pool and Port columns in 

Figure 16-4

 show that the circuit on port 5 is drawn from Pool 2, and no other 

circuits are drawn from Pool 2. Deleting this one circuit will free up an STS-3c or STS-1-3v worth of 
bandwidth from a single pool. 

The POS Port table has a row for each port with three columns (

Figure 16-4

). They show the port 

number, the circuit size and type, and the pool it is drawn from. The Pool Utilization table has two 
columns and shows the pool number, the type of circuits on that pool, how much of the pool’s capacity 
is being used, and whether additional capacity is available. 

124894

Port 5 belongs to Pool 2

Summary of Contents for CE-100T-8

Page 1: ...nteroperability with other ONS platforms refer to the POS on ONS Ethernet Cards chapter of the Ethernet Card Software Feature and Configuration Guide for the ONS 15454 SDH ONS 15454 and ONS 15327 Chapter topics include CE 100T 8 Overview page 16 1 CE 100T 8 Ethernet Features page 16 2 CE 100T 8 SONET Circuits and Features page 16 6 CE 100T 8 Overview The CE 100T 8 is a Layer 1 mapper card with eig...

Page 2: ...port For example included IEEE 802 1Q information will travel through the process unaffected The ONS 15454 CE 100T 8 and the ONS 15310 CE 100T 8 support maximum Ethernet frame sizes of 1600 bytes including the CRC The MTU size is not configureable and is set at a 1500 byte maximum standard Ethernet MTU Baby giant frames in which the standard Ethernet frame is augmented by 802 1 Q tags or MPLS tags...

Page 3: ...e the CE 100T 8 sends out a pause frame and requests that the router delay its transmission for a certain period of time With flow control and a substantial per port buffering capability a private line service provisioned at less than full line rate capacity STS 1 is efficient because frame loss can be controlled to a large extent Ethernet Link Integrity Support The CE 100T 8 supports end to end E...

Page 4: ...are placed on separate queues the priority queuing feature should not be used to separate rate based CIR EIR marked traffic sometimes done at a Metro Ethernet service provider edge This could result in out of order packet delivery for packets of the same application which would cause performance issues with some applications For an IP ToS tagged packet the CE 100T 8 can map any of the 256 prioriti...

Page 5: ... flow control is enabled default on the CE 100T 8 Under flow control a 6 kilobyte single priority first in first out FIFO buffer fills then a PAUSE frame is sent This results in the packet ordering priority becoming the responsibility of the external device which is buffering as a result of receiving the PAUSE flow control frames Note Priority queuing has no effect when the CE 100T 8 is provisione...

Page 6: ...ard Table 16 3 shows the circuit sizes available for the CE 100T 8 on the ONS 15310 CL A single circuit provides a maximum of 100 Mbps of throughput even when an STS 3c circuit which has a bandwidth equivalent of 155 Mbps is provisioned This is due to the hardware restriction of the Fast Ethernet port A VCAT circuit is also restricted in this manner Table 16 3 shows the minimum SONET circuit sizes...

Page 7: ...ons are observed The following table details the maximum density service combinations This LO VCAT Circuit combination is achievable if the first circuit created on the card is an LO VCAT circuit If the first circuit created on the card is HO VCAT or CCAT STS circuits then a maximum of six LO VCAT circuits can be added on the card Table 16 5 CCAT High Order Circuit Size Combinations Number of STS ...

Page 8: ... to provision an STS 3c or STS 1 3v on the CE 100T 8 card shown in Figure 16 4 an STS 3c or STS 1 3v worth of bandwidth is not available from either of the two pools The user needs to delete circuits from the same pool to free up bandwidth If the bandwidth is available but scattered among the pools the circuit cannot be provisioned Looking at the POS Port Map table the user can determine which cir...

Page 9: ...ional line switched ring BLSR uses protection channel access PCA Alarms are supported on a per member as well as per virtual concatenation group VCG basis Note The maximum tolerable VCAT differential delay for the CE 100T 8 is 48 milliseconds The VCAT differential delay is the relative arrival time measurement between members of a virtual concatenation group VCG CE 100T 8 POS Encapsulation Framing...

Page 10: ...k J1 Path Trace and SONET Alarms The CE 100T 8 card supports terminal and facility loopbacks when in the Out of Service Maintenance state OOS MT It also reports SONET alarms and transmits and monitors the J1 Path Trace byte in the same manner as OC N cards Support for path termination functions includes H1 and H2 concatenation indication C2 signal label Bit interleaved parity 3 BIP 3 generation G1...

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