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All rights reserved. Printed in USA. scr 120 60 Show Commands Topology Map for Interface SRP0/0 Topology pkt. sent every 10 sec. (next pkt. ) Last received topology pkt. 4444 mfr-jc1# 606 0921_04F9_c3 121 © 1999, Cisco Systems, Inc. 3/8 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 122 61 Show Commands mfr-jc1#sh cont srp ? <0-15> SRP interface number details show all the details for the interface
Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. 1 Remote Ring id : Outer 606 0921_04F9_c3 BIP(B1) = 1638 BIP(B2) = 5088 BIP(B3) = 1662 NSE = 0 125 © 1999, Cisco Systems, Inc. Debug Commands mfr-jc1#debug srp ? error SRP protocol errors ips SRP IPS packet SRP packets periodic SRP periodic activity topology SRP topology 606 0921_04F9_c3 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 126 63 Application • POP Interconnect • Campus Ring • Metro/City Ring • Hierarchical Ring 606 0921_04F9_c3 127 © 1999, Cisco Systems, Inc.
Printed in USA. scr 64 32 Ring Selection • Ring selection is done by ARP’ing A B • ARP request is sent on Outer and Inner ring in alternating order • Responding node uses its topology map to determine which ring to send the respond • Requesting node uses respond to determine ring selection 606 0921_04F9_c3 D ARP Respond ARP Request C Topology Map 65 © 1999, Cisco Systems, Inc. Ring Selection • When a node detects a ring wrap it issues a gratuitous ARP which is used to update the ARP table of all nodes on the ring • Static ARP can be used to force the selection of a particular ring 606 0921_04F9_c3 © 1999, Cisco Systems, Inc.