Cisco Bug: CSCvu71940 - Cisco 8000 series router forwards ipv6 packets destined to ::1 when ipv6 default route is configured
Jul 16, 2020
- Cisco 8000 Series Routers
Known Affected Releases
Symptom: Cisco 8000 series router forwards a ipv6 packet which is destined to a Loopback ipv6 address (::1/128) This happens when a ipv6 default route is setup For example: the following is the default route configuration router static address-family ipv6 unicast ::/0 3000::1 Under this condition, a packet destined to ::1 is forwarded to 3000::1 The issue is observed with either the Global routing table or the VRF table router static vrf vrf1 address-family ipv6 unicast ::/0 300A::1 Under this condition, a packet destined to ::1 in the vrf1 routing table is forwarded to 300A::1 Conditions: This is seen on a Cisco 8000 series router. All IOS-XR releases are affected A default ipv6 static route is added to forward all unknown ipv6 prefixes Both Global routing table and VRF table will observe this.
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