Technical data

Brocade MLX Series and NetIron Family Documentation Updates 5
53-1002805-03
IPv6 Traceroute over an MPLS network
1
IPv6 Traceroute over an MPLS network
TABLE 2 Supported platforms
NOTE
IPv6 MPLS traceroute not supported on the BR-MLX-10Gx24-DM 24-port 10GbE module.
IPv6 traceroute behavior is similar to IPv4 traceroute. However, unlike IPv4 traceroute, IPv6
traceroute has a new 6PE label added during each hop across the MPLS cloud. Based on the IP
header value, the node devices differentiate if the Internet Control Message Protocol version 6
(ICMPv6) echo request is from an IPv6 or IPv4 source device.
When the traceroute sends ICMPv6 echo request packets with a TTL value (hop limit) value of 1,
the first router in the path replies with the ttl-exceeded error message to the source. The next
packet has a TTL (hop limit) value of 2 and the second router replies with the ttl-exceeded error
message. This process continues till the destination host receives the packets and returns an
ICMPv6 Echo Reply message.
Based on the ttl-exceeded messages or the ICMPv6 Echo Reply messages received during the
traceroute operation, the source device obtains details such as the hop sequence, total hops taken
to complete the path, and the IPv4 or IPv6 addresses of devices that it passed during the path. For
each hop, the traceroute gathers information about the hop number, best hop time, and the TTL
value.
Features
supported
Brocade
NetIron
XMR Series
Brocade MLX
Series
Brocade
NetIron CES
2000 Series
BASE
package
Brocade
NetIron CES
2000 Series
ME_PREM
package
Brocade
NetIron CES
2000 Series
L3_PREM
package
Brocade
NetIron CER
2000 Series
Base
package
Brocade
NetIron CER
2000 Series
Advanced
Services
package
IPv6
Traceroute
over an
MPLS
network
Yes Yes No Yes Yes No Yes