Resiliency Enhancement for IPv4 and IPV6 Static Routes
The ExtremeXOS Resiliency Enhancement feature provides a
resilient way to use Equal-Cost Multi-Path (ECMP) to load balance IPv4 traffic among multiple
servers or other specialized devices. ExtremeXOS automatically manages the set of active devices
using ECMP static routes configured with ping protection to monitor the health of these routes.
Such servers or specialized devices do not require special software to support Bidirectional
Forwarding Detection (BFD), or IP routing protocols such as OSPF, or proprietary protocols to
provide keepalive messages. ExtremeXOS uses industry-standard and required protocols ICMP/ARP for
IPv4 to accomplish the following automatically:
- Initially verify devices and activate their static routes, without waiting for inbound user
traffic, and without requiring configuration of device MAC addresses.
- Detect silent device outages and inactivate corresponding static
routes.
- Reactivate static routes after device recovery, or hardware replacement with a new MAC
address.
ExtremeXOS previously supported similar protection and resiliency
using BFD on IPv4 static routes. However, BFD can only be used when the local and remote device
both support BFD.
Supported Platforms
- Summit X440, X450-G2, X460, X460-G2, X480, X670, X670-G2, and X770
series switches
- BlackDiamond X8 and 8000 series switches
- E4G-200 and E4G-400 cell site routers
New CLI Commands
configure iproute add [default | ipv4_or_ipv6_network] gateway {protection [bfd | ping |none]}
configure iproute {ipv4 | ipv6} protection ping
interval
seconds
miss
misses
enable iproute {ipv4 | ipv6} protection
ping
disable iproute {ipv4 | ipv6} protection
ping
show iproute {ipv4 | ipv6} protection ping
{v4_or_v6_gateway} {vr
vr_name} {detail}
Changed CLI Commands
The following are revised commands for the ExtremeXOS Resiliency Enhancement for IPv4 and IPv6
Static Routes feature:
- The configuration settings for static route ping protection enable/disable, interval, and
misses for IPv4 appear in the show ipconfig command, and for IPv6 in the
show ipconfig ipv6 command.
- A new route flag letter "I" appears in the show iproute and show
ipconfig ipv6 commands to indicate static routes with ICMP ping protection. Flag
letter "I" uses the same column as flag letter "b" because BFD and ping protection are
mutually exclusive. If the route flags also show "U" for Up, then ping protection detected the
gateway is up.