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12-37
Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 12 SONET Topologies and Upgrades
12.11 OC-N Speed Upgrades
Note Replacing cards that are the same speed are not considered span upgrades. For example replacing a
four-port OC-3 with an eight-port OC-3 card or replacing a single-port OC-12 with a four-port OC-12
card.
To perform a span upgrade, the higher-rate OC-N card must replace the lower-rate card in the same slot.
If the upgrade is conducted on spans residing in a BLSR, all spans in the ring must be upgraded. The
protection configuration of the original lower-rate OC-N card (two-fiber BLSR, four-fiber BLSR, path
protection, and 1+1) is retained for the higher-rate OC-N card.
To perform a span upgrade on either the OC192-XFP or MRC-12 card with an SFP/XFP (known as
pluggable port modules, PPMs, in CTC), the higher-rate PPM must replace the lower-rate PPM in the
same slot. If you are using a multi-rate PPM, you do not need to physically replace the PPM but can
provision the PPM for a different line rate. All spans in the network must be upgraded. The 1+1
protection configuration of the original lower-rate PPM is retained for the higher-rate PPM.
When performing span upgrades on a large number of nodes, we recommend that you upgrade all spans
in a ring consecutively and in the same maintenance window. Until all spans are upgraded, mismatched
card types or PPM types are present.
We recommend using the Span Upgrade Wizard to perform span upgrades. Although you can also use
the manual span upgrade procedures, the manual procedures are mainly provided as error recovery for
the wizard. The Span Upgrade Wizard and the Manual Span Upgrade procedures require at least two
technicians (one at each end of the span) who can communicate with each other during the upgrade.
Upgrading a span is non-service affecting and causes no more than three switches, each of which is less
than 50 ms in duration.
Table 12-6 Upgrade Options for Slots 1 through 4 and 14 through 17
Cards
Four-port
OC-3
Eight-port
OC-3
One-port
OC-12
Four-port
OC-12 OC-48 OC-192 MRC-2.5G-4 MRC-12
Four-port OC-3 — Supported Not
supported
Not
supported
Not
supported
— Supported Not
supported
Eight-port OC-3 Supported — Not
supported
Not
supported
Not
supported
—Not
supported
Not
supported
One-port OC-12 Not
supported
Not
supported
— Supported Supported — Not
Supported
Supported
Four-port OC-12 Not
supported
Not
supported
Supported — Not
supported
— Supported Not
supported
OC-48 Not
supported
Not
supported
Supported Not
supported
— — Supported Supported
OC-192
1
1. The OC-192 is not supported on Slots 1 through 4 and 14 through 17.
———————Not
supported
MRC-2.5G-4 Supported Not
supported
Not
Supported
Supported Supported — — Not
supported
MRC-12 Not
supported
Not
supported
Supported Not
supported
Supported — Not
supported
—