This holds a semicolon-separated list of ISP (Internet Service Provider) names that a syslog policy filters its operation logs by, where an empty value means all ISPs are traced. An admin uses this on multi-ISP access devices to scope a logging policy to specific ISPs' user traffic rather than tracing every ISP's operation logs, keeping log volume focused on the ISPs that matter to that policy. For example, setting syslogPolicyIsp to "ISP1;ISP2" would restrict that policy's operation logging to users of those two ISPs, per the MIB's own example.