Cisco 15327 - Manual (Page 471)

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Ethernet Card Software Feature and Configuration Guide, R7.2
Chapter 26 Configuring IEEE 802.17b Resilient Packet Ring
RI Configuration Example
Caution RPR-IEEE RI requires communication over the topology between the ML-Series cards. Traffic loss can
occur if there is not enough communication and more than one span is down on a ring, for any reason.
Caution If the primary ML-Series card goes to standby because the interconnect interface goes down, then the
ring interface is placed admininistratively down (admin down). This action signals the secondary
ML-Series card to go to active. At this time, if the user configures a no shutdown on the primary
ML-Series card ring interface, the ring interface comes up. This will signal the secondary ML-Series
card to go to standby, which causes traffic loss. This occurs with all ML-Series card microcodes and with
both RPR-IEEE and Cisco proprietary RPR.
Caution With Cisco proprietary RPR, a shutdown of the SPR interface puts ML1000-2 cards in passthrough
mode. This allows the card to participate in RI. ML1000-2 cards are the only ML-Series cards eligible
for RI. Other ML-Series cards fail to enter passthrough mode, when the SPR interface is shutdown.
RI Configuration Example
Excerpts of sample Cisco IOS code for an RPR RI for ML-Series-card-only connections are provided in
Example 26-9 and Example 26-10 . Excerpts of sample Cisco IOS code for an RPR RI where the primary
and secondary ML-Series cards are connected to any switch that is not an ML-Series card (foreign
switch), are provided in
Example 26-9 and Example 26-10 . Status of RI can be found using
Example 26-13
Example 26-9 Primary ML-Series Card Configuration
interface rpr-ieee0
no ip address
rpr-ieee ri mode
no shutdown
In the above example, after rpr-ieee ri mode you need to insert the MAC address of the primary peer. To
fetch this address, log in to the primary peer ML-Series card and enter the command show interface
rpr-ieee as follows:
Router#show interface rpr-ieee 0
RPR-IEEE0 is up, line protocol is up
Hardware is RPR-IEEE Channelized SONET, address is 0019.076c.7f71 (bia 0019.076c.7f71)
The MAC address of the primary peer is 0019.076c.7f71. The configuration would now appear as
rpr-ieee ri mode 0019.076c.7f71.
Example 26-10 Secondary ML-Series Card Configuration
interface rpr-ieee0
no ip address
rpr-ieee ri mode
no shutdown
In the above example, after rpr-ieee ri mode you need to insert the MAC address of the secondary peer.
To fetch this address, log in to the secondary peer ML-Series card and enter the command show
interface rpr-ieee as follows: