user manual

REVIEW DRAFT—CISCO CONFIDENTIAL
14-10
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 14 Ethernet Operation
14.3 E-Series Application
The operation of a G-Series card in transponder mode is also similar to the operation of a G-Series card
in SDH mode:
• G-Series Ethernet statistics are available for ports in both modes.
• Ethernet port level alarms and conditions are available for ports in both modes.
• Jumbo frame and non-jumbo frame operation is the same in both modes.
• Collection, reporting and threshold crossing conditions for all existing counters and performance
monitoring (PM) parameters are the same in both modes.
• SNMP and RMON support is the same in both modes.
14.3 E-Series Application
The E-Series cards incorporate Layer 2 switching, whereas the G-Series card is a straight mapper card.
E-Series cards in multicard Etherswitch Group or single-card EtherSwitch support virtual local area
networks (VLANs), IEEE 802.1Q, STP, and IEEE 802.1D. The E-Series card in port-mapped mode
configures the E-Series card to be a mapper card and disables the Layer 2 functions. An ONS 15454 SDH
holds a maximum of ten Ethernet cards, and you can insert Ethernet cards in any multipurpose slot.
14.3.1 E-Series Modes
An E-Series card operates in one of three modes: Multicard EtherSwitch Group, Single-card
EtherSwitch, or Port-mapped. Within an ONS 15454 SDH containing multiple E-Series cards, each
E-Series card can operate in any of the three separate modes. At the Ethernet card view in CTC, click
the Provisioning > Ether Card tabs to reveal the card modes.
Note Port-mapped mode eliminates issues inherent in other E-Series modes and detailed in the field notice,
“E-Series Ethernet Line Card Packet Forwarding Limitations.”
14.3.1.1 E-Series Multicard EtherSwitch Group
Multicard EtherSwitch Group provisions two or more Ethernet cards to act as a single Layer 2 switch.
It supports one VC4-3c circuit, two VC4-2c circuits, or six VC4 circuits. Each multicard switch may
connect up to a total of VC4-3c in SDH circuits. When provisioned as an add or drop node of a shared
packet ring circuit, the effective bandwidth doubles, supporting VC4-3c in each direction of the ring.
Figure 14-9 illustrates a multicard EtherSwitch configuration.