To locate and download MIBs for selected platforms, Cisco IOS XE software releases, and feature sets, use Cisco MIB Locator found at the following URL:
Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the 3rd-Generation Partnership Project (3GPP)
RFC 3608
Session Initiation Protocol (SIP) Extension Header Field for Service Route Discovery During Registration
RFC 3711
The Secure Real-time Transport Protocol (SRTP)
RFC 3925
Vendor-Identifying Vendor Options for Dynamic Host Configuration Protocol version 4 (DHCPv4)
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