C++ regex match, not matching

So I have the following text in a std::string:

2: enp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000\    link/ether 68:f7:28:4e:7b:ac brd ff:ff:ff:ff:ff:ff

and I am trying to extract the 'enp1s0' and '68:f7:28:4e:7b:ac' using the following regex:

\d{1}:\s+(\w+).*link\/ether\s{1}([a-z0-9:]+)

which works in an online regex tester, but this C++ code does not detect a match:

std::regex interface_address("^\\d{1}:\\s+(\\w+).*link\\/ether\\s{1}([a-z0-9:]+)");
std::smatch pieces;
if (std::regex_match(line, pieces, interface_address)) {
    std::string name = "";
    std::string address = "";
    for (size_t i = 0; i < pieces.size(); ++i) {
        auto submatch = pieces[i];
        if (i == 0) {
            name = submatch.str();
        } else if (i == 1) {
            address = submatch.str();
        }
    }
    std::cout << name << address << std::endl;
}

where am i going wrong?