Cisco Ptopo Ext Cdp Proxy If

1.3.6.1.4.1.9.9.261.1.2.1.4

Physical topology information for the local port (identified by cPtopoExtCdpLocalChassis and cPtopoExtCdpLocalPort of this row) can be discovered from CDP running on the local port, if it is CDP capable or from CDP running on a proxy interface. In the case of optical ports running wavelength division multiplexing, the physical connector port on which the CDP packet is transmitted is different from the logical interface representing the wavelength on which CDP is running. In such a case, physical topology for the 'external' optical port can be learned from CDP running on one of the wavelengths. This object is set to zero if physical topology information for the local port is discovered from CDP running on itself. Otherwise, this object contains the ifIndex value of the CDP capable interface which is being used as proxy to learn physical topology information for the local port. Usage of this object is possible only if the local port is the 'External Port', as specified in the CDP protocol, for the proxy interface. This object may be modified when the associated cPtopoExtCdpRowStatus object has a value of 'active'.