A collaboration engineer is configuring SIP interdomain federation for Cisco IM and Presence. The external domain cannot be discovered using DNS SRV. If the external enterprise domain is ciscocollab.com, what destination pattern should the engineer use for a static route?
When configuring a static route for SIP interdomain federation in a Cisco IM and Presence deployment, if the external domain cannot be discovered using DNS SRV, the engineer must provide a destination pattern that matches the external domain. The correct destination pattern in this context would be '.ciscocollab.com' as it directly references the external domain without adding unnecessary characters or wildcards that could lead to incorrect routing.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/im_presence/interdomain_federation/12_5_1/cup0_b_interdomain-federation-1251/cup0_b_interdomain-federation-1251_chapter_011000.html?bookSearch=true the Destination Pattern value must be ".com.domaina.*". and the option also missed the "."
SIP DNS SRVs in an Interdomain Federation Deployment In the following example, multiple local domains must all resolve to the same Public FQDN and a DNS SRV record must be published for each domain that is hosted in the IM and Presence Service deployment. The following figure shows an example interdomain federation deployment with three local domains. You must publish a _sipfederationtls DNS SRV record for each domain. C is correct