10.1. Default Source Address Selection

The source address selection rules, in conjunction with the default policy table, produce the following behavior:

Example 1:

• Destination: 2001:db8:1::1
• Candidate Source Addresses: 2001:db8:3::1 or fe80::1
• Result: 2001:db8::1 (prefer appropriate scope)

Example 2:

• Destination: ff05::1
• Candidate Source Addresses: 2001:db8:3::1 or fe80::1
• Result: 2001:db8:3::1 (prefer appropriate scope)

Example 3:

• Destination: 2001:db8:1::1
• Candidate Source Addresses: 2001:db8:1::1 (deprecated) or 2001:db8:2::1
• Result: 2001:db8:1::1 (prefer same address)

Example 4:

• Destination: fe80::1
• Candidate Source Addresses: fe80::2 (deprecated) or 2001:db8:1::1
• Result: fe80::2 (prefer appropriate scope)

Example 5:

• Destination: 2001:db8:1::1
• Candidate Source Addresses: 2001:db8:1::2 or 2001:db8:3::2
• Result: 2001:db8:1:::2 (longest matching prefix)

Example 6:

• Destination: 2001:db8:1::1
• Candidate Source Addresses: 2001:db8:1::2 (care-of address) or 2001:db8:3::2 (home address)
• Result: 2001:db8:3::2 (prefer home address)

Example 7:

• Destination: 2002:c633:6401::1
• Candidate Source Addresses: 2002:c633:6401::d5e3:7953:13eb:22e8 (temporary) or 2001:db8:1::2
• Result: 2002:c633:6401::d5e3:7953:13eb:22e8 (prefer matching label)

Example 8:

• Destination: 2001:db8:1::d5e3:0:0:1
• Candidate Source Addresses: 2001:db8:1::2 (public) or 2001:db8:1::d5e3:7953:13eb:22e8 (temporary)
• Result: 2001:db8:1::d5e3:7953:13eb:22e8 (prefer temporary address)