EVPN ND ext community support NA flag R-bit, to have proxy ND.
Set R-bit in EVPN NA if a given router is default gateway or there is a
local
router attached, which can be determine based on local neighbor entry.
Implement BGP ext community attribute to generate and parse R-bit and
pass along zebra to program neigh entry in kernel.
Upon receiving MAC/IP update with community type 0x06 and sub_type 0x08,
pass the R-bit to zebra to program neigh entry.
Set NTF_ROUTER in neigh entry and inform kernel to do proxy NA for EVPN.
Ref:
https://tools.ietf.org/html/draft-ietf-bess-evpn-na-flags-01
Ticket:CM-21712, CM-21711
Reviewed By:
Testing Done:
Configure Local vni enabled L3 Gateway, which would act as router,
checked
show evpn arp-cache vni x ip <ip of svi> on originated and remote VTEPs.
"Router" flag is set.
Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>
This commit removes various parts of the bgpd implementation code which
are unused/useless, e.g. unused functions, unused variable
initializations, unused structs, ...
Signed-off-by: Pascal Mathis <mail@pascalmathis.com>
In Symmetric routing case, L3VNI stores evpn MAC_IP routes
as IP_PREFIX routes in associated bgp_vrf and fib.
When vxlan device for l3vni goes down, triggers l3vni delete
in bgp.
As part l3vni delete, evpn ip prefix routes associated
with the vni need to be withdrawn from zebra as well
bgpinfo needs to be freed.
bgp_delete does not free bgp_info associated
to evpn ip prefix routes (link to bgp_vrf).
Call to uninstall_evpn_route_entry_in_vrf() properly
cleanup bgp_info as well triggers appropriate updates.
Ticket:CM-21443
Testing Done:
On DUT, bringup symmetric routing configuration, learn
EVPN Type-2 and Type-3 Routes.
Type-2 MAC_IP routes will be stored as ip_prefix in vrf table
during l3vni bring up.
Remove L3vni, deletes all ip_prefix routes from the zebra, kernel
vrf route table and bgp_info is freed.
Check the show bgp memory stats for bgp_info post l3vni flap.
Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>
This correction fixes three bugs detected by Clang scan:
Bug Group: Logic error
Bug Type: Dereference of null pointer
File: bgpd/bgp_evpn.c
Function: bgp_evpn_unconfigure_import_rt_for_vrf
Line: 4246
File: isisd/isis_spf.c
Function: isis_print_paths
Line: 69 (two bugs of same type in one line)
Signed-off-by: F. Aragon <paco@voltanet.io>
The bgp data structures:
bgp->vnihash
bgp->vrf_export_rtl
bgp->vrf_import_rtl
bgp->l2vnis
Must always be valid data structures. So remove the tests
that ensure that they are.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Move the list_delete_and_null of the virt->vrfs code to
the actual deletion function to ensure proper lifecycle.
This assumption allows us to know that irt->vrfs is always
true so remove the NULL check on it.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The irt->vnis list was being freed on going down,
but actually delete it from the deletion function. Then
we can know that the irt->vnis is a valid list anywhere
we have a irt pointer.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
There exists code paths where the rn was being used after free.
This eliminates these code paths.
Fixes: CM-21019
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Ensure that when EVPN routes are imported into a VRF as IPv4 routes,
the NEXT_HOP attribute is set. In the absence of this, this attribute
is currently not generated when advertising the route to peers in the
VRF. It is to be noted that the source route (the EVPN route) will only
have the MP_REACH_NLRI attribute that contains the next hop in it.
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by: Mitesh Kanjariya <mitesh@cumulusnetworks.com>
Reviewed-by: Don Slice <dslice@cumulusnetworks.com>
Imported routes in a VRF routing table have a reference to their parent
route entry which resides in the EVPN or IPVPN routing table. Ensure that
this reference uses appropriate locking so that the parent entry doesn't
get freed prematurely.
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>
(cherry picked from commit 13cb6b22ba9d558b1b4a1e8752f63f13242462a7)
Conflicts:
bgpd/bgp_mplsvpn.c
Ticket: CM-20471
Testing Done:
a) Ran vrf_route_leak tests without fix and hit crash, ran twice with fix
and did not see the crash.
b) Ran evpn-smoke and ensured there were no new failures.
There are situations in which zebra may issue more than one delete
notification, so BGP should not warn when it can't locate the VNI
at delete. This is comparable to the situation when a withdraw is
received but the route isn't present locally.
Signed-off-by: Vivek Venkatraman <vivek@cumulusmetworks.com>
Ticket: CM-17512
Reviewed By: Trivial
Testing Done: Manual
EVPN prefix depends on the EVPN route type.
Currently, in FRR we have a prefix_evpn/evpn_addr which relates to a evpn prefix.
We need to convert this to encompass an union of various EVPN route-types.
This diff handles the necessary code changes to adopt the new struct evpn_addr.
Signed-off-by: Mitesh Kanjariya <mitesh@cumulusnetworks.com>
Setup a per-VRF identifier to use along with the Router Id to build the
RD. Define a function to encode the RD. Code is brought over from EVPN
and EVPN code has been modified to use the generic function.
Ticket: CM-20256
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
RFC 8635 explains how RT auto-derivation should be done in section
5.1.2.1 [1]. In addition to encoding the VNI in the lowest bytes, a
3-bit field is used to encode a namespace. For VXLAN, we have to put 1
in this field. This is needed for proper interoperability with RT
auto-derivation in JunOS. Since this would break existing setup, an
additional option, "autort rfc8365-compatible" is used.
[1]: https://tools.ietf.org/html/rfc8365#section-5.1.2.1
Signed-off-by: Vincent Bernat <vincent@bernat.im>
Ethernet Tag ID (ETI) is part of the prefix. It cannot just be ignored
as it needs to be used when checking for prefix uniqueness. Moreover,
when using Quagga as a route reflector, we need to keep its
value. Therefore, we correctly parse and encode it. We also parse
ESI. While not part of the prefix, it needs to be reflected correctly
by Quagga.
Signed-off-by: Vincent Bernat <vincent@bernat.im>
Routes that have labels must be sent via a nexthop that also has labels.
This change notes whether any path in a nexthop update from zebra contains
labels. If so, then the nexthop is valid for routes that have labels.
If a nexthop update has no labeled paths, then any labeled routes
referencing the nexthop are marked not valid.
Add a route flag BGP_INFO_ANNC_NH_SELF that means "advertise myself
as nexthop when announcing" so that we can track our notion of the
nexthop without revealing it to peers.
Signed-off-by: G. Paul Ziemba <paulz@labn.net>
When an L3 VNI is deleted, cleanup linkage to it from associated
L2 VNIs.
Updates: bgpd: keep a backpointer to vrf instance in struct bgpevpn
[Mitesh Kanjariya]
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by: Mitesh Kanjariya <mitesh@cumulusnetworks.com>
The following types are nonstandard:
- u_char
- u_short
- u_int
- u_long
- u_int8_t
- u_int16_t
- u_int32_t
Replace them with the C99 standard types:
- uint8_t
- unsigned short
- unsigned int
- unsigned long
- uint8_t
- uint16_t
- uint32_t
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
The str2prefix_rd function can fail, but for auto-derived
values this should be impossible to happen. So ignore it.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit does these 2 things:
1) irt->vrfs is never NULL so no need to test for it
2) No need to check for a good irt value returned from
vrf_import_rt_new as that the alloc operation will
dump if memory allocation fails.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Set EVPN routes imported into a VRF to (sub)type BGP_ROUTE_IMPORTED and
use this for passing appropriate information to zebra. This is needed
because relying on the Router MAC for this purpose was incorrect and
impacted routing to/from external destinations, particularly for IPv6.
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
In bgp_update_receive the first thing we do is establish
that the peer->status is Established. We then do a bunch
of work and call bgp_nlri_parse where we break out for
each address family. Each AFI is then checking for
being peer->status is Established again. There is no
point in checking this again.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Received PMSI tunnel attributes (in EVPN type-3 route) were not recognized.
Parse them and display the tunnel type when looking at routes. Note that
the only tunnel type currently supported is ingress replication (IR). A
warning message will be logged if the received tunnel type is something
else, but the attribute is otherwise ignored.
Updates: a21bd7a (bgpd: add PMSI_TUNNEL_ATTRIBUTE to EVPN IMET routes)
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Implement support for EVPN symmetric routing for IPv6 routes. The next hop
for EVPN routes is the IP address of the remote VTEP which is only an IPv4
address. This means that for IPv6 symmetric routing, there will be IPv6
destinations with IPv4 next hops. To make this work, the IPv4 next hops are
converted into IPv4-mapped IPv6 addresses.
As part of support, ensure that "L3" route-targets are not announced with
IPv6 link-local addresses so that they won't be installed in the routing
table.
Signed-off-by: Vivek Venkatraman vivek@cumulusnetworks.com
Reviewed-by: Mitesh Kanjariya mitesh@cumulusnetworks.com
Reviewed-by: Donald Sharp sharpd@cumulusnetworks.com
